900439 has 4 divisors (see below), whose sum is σ = 953424. Its totient is φ = 847456.

The previous prime is 900409. The next prime is 900443. The reversal of 900439 is 934009.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900439 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900409) 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, 26467 + ... + 26500.

It is an arithmetic number, because the mean of its divisors is an integer number (238356).

2⁹⁰⁰⁴³⁹ is an apocalyptic number.

900439 is a deficient number, since it is larger than the sum of its proper divisors (52985).

900439 is a wasteful number, since it uses less digits than its factorization.

900439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52984.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 900439 is about 948.9146431582. The cubic root of 900439 is about 96.5646340511.

The spelling of 900439 in words is "nine hundred thousand, four hundred thirty-nine".