890007889 has 3 divisors (see below), whose sum is σ = 890037723. Its totient is φ = 889978056.

The previous prime is 890007887. The next prime is 890007913. The reversal of 890007889 is 988700098.

The square root of 890007889 is 29833.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 988700098 = 2 ⋅494350049.

It can be written as a sum of positive squares in only one way, i.e., 378886225 + 511121664 = 19465^2 + 22608^2 .

It is not a de Polignac number, because 890007889 - 2¹ = 890007887 is a prime.

It is a super-2 number, since 2×890007889² = 1584228084964472642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890007887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14917 + ... + 44749.

It is an arithmetic number, because the mean of its divisors is an integer number (296679241).

Almost surely, 2^890007889 is an apocalyptic number.

890007889 is the 29833-rd square number.

890007889 is the 14917-th centered octagonal number.

It is an amenable number.

890007889 is a deficient number, since it is larger than the sum of its proper divisors (29834).

890007889 is an frugal number, since it uses more digits than its factorization.

890007889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59666 (or 29833 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 49.

The cubic root of 890007889 is about 961.9030137081.

Multiplying 890007889 by its sum of digits (49), we get a square (43610386561 = 208831²).

The spelling of 890007889 in words is "eight hundred ninety million, seven thousand, eight hundred eighty-nine".