900631 has 4 divisors (see below), whose sum is σ = 906192. Its totient is φ = 895072.

The previous prime is 900623. The next prime is 900649. The reversal of 900631 is 136009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136009 = 43 ⋅3163.

It is a cyclic number.

It is not a de Polignac number, because 900631 - 2³ = 900623 is a prime.

It is a super-2 number, since 2×900631² = 1622272396322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 900599 and 900608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900671) 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, 2530 + ... + 2863.

It is an arithmetic number, because the mean of its divisors is an integer number (226548).

2⁹⁰⁰⁶³¹ is an apocalyptic number.

900631 is a deficient number, since it is larger than the sum of its proper divisors (5561).

900631 is a wasteful number, since it uses less digits than its factorization.

900631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 900631 is about 949.0158059801. The cubic root of 900631 is about 96.5714970339.

The spelling of 900631 in words is "nine hundred thousand, six hundred thirty-one".