900989 has 4 divisors (see below), whose sum is σ = 916320. Its totient is φ = 885660.

The previous prime is 900973. The next prime is 900997. The reversal of 900989 is 989009.

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.

It is a cyclic number.

It is not a de Polignac number, because 900989 - 2⁴ = 900973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900929) 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, 7577 + ... + 7694.

It is an arithmetic number, because the mean of its divisors is an integer number (229080).

2⁹⁰⁰⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

900989 is a deficient number, since it is larger than the sum of its proper divisors (15331).

900989 is a wasteful number, since it uses less digits than its factorization.

900989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15330.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 900989 is about 949.2044036982. The cubic root of 900989 is about 96.5842910328.

The spelling of 900989 in words is "nine hundred thousand, nine hundred eighty-nine".