889900381 has 4 divisors (see below), whose sum is σ = 889973532. Its totient is φ = 889827232.

The previous prime is 889900373. The next prime is 889900393. The reversal of 889900381 is 183009988.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 429111225 + 460789156 = 20715^2 + 21466^2 .

It is a cyclic number.

It is not a de Polignac number, because 889900381 - 2³ = 889900373 is a prime.

It is a super-2 number, since 2×889900381² = 1583845376207890322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889900331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13456 + ... + 44281.

It is an arithmetic number, because the mean of its divisors is an integer number (222493383).

Almost surely, 2^889900381 is an apocalyptic number.

It is an amenable number.

889900381 is a deficient number, since it is larger than the sum of its proper divisors (73151).

889900381 is a wasteful number, since it uses less digits than its factorization.

889900381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73150.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 889900381 is about 29831.1981153959. The cubic root of 889900381 is about 961.8642813048.

The spelling of 889900381 in words is "eight hundred eighty-nine million, nine hundred thousand, three hundred eighty-one".