900889 has 4 divisors (see below), whose sum is σ = 982800. Its totient is φ = 818980.

The previous prime is 900869. The next prime is 900917. The reversal of 900889 is 988009.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 988009 = 11 ⋅89819.

It is a cyclic number.

It is not a de Polignac number, because 900889 - 2⁷ = 900761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (900869) 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 3 ways as a sum of consecutive naturals, for example, 40939 + ... + 40960.

It is an arithmetic number, because the mean of its divisors is an integer number (245700).

2⁹⁰⁰⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

900889 is a deficient number, since it is larger than the sum of its proper divisors (81911).

900889 is a wasteful number, since it uses less digits than its factorization.

900889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81910.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 900889 is about 949.1517265432. The cubic root of 900889 is about 96.5807176312.

The spelling of 900889 in words is "nine hundred thousand, eight hundred eighty-nine".