900831 has 4 divisors (see below), whose sum is σ = 1201112. Its totient is φ = 600552.

The previous prime is 900821. The next prime is 900863. The reversal of 900831 is 138009.

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

It is not a de Polignac number, because 900831 - 2¹⁰ = 899807 is a prime.

It is a super-2 number, since 2×900831² = 1622992981122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 900798 and 900807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900821) 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, 150136 + ... + 150141.

It is an arithmetic number, because the mean of its divisors is an integer number (300278).

2⁹⁰⁰⁸³¹ is an apocalyptic number.

900831 is a deficient number, since it is larger than the sum of its proper divisors (300281).

900831 is a wasteful number, since it uses less digits than its factorization.

900831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300280.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 900831 is about 949.1211724538. The cubic root of 900831 is about 96.5786449372.

The spelling of 900831 in words is "nine hundred thousand, eight hundred thirty-one".