901631 has 4 divisors (see below), whose sum is σ = 923664. Its totient is φ = 879600.

The previous prime is 901613. The next prime is 901643. The reversal of 901631 is 136109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136109 = 131 ⋅1039.

It is a cyclic number.

It is not a de Polignac number, because 901631 - 2⁶ = 901567 is a prime.

It is a super-2 number, since 2×901631² = 1625876920322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901931) 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, 10955 + ... + 11036.

It is an arithmetic number, because the mean of its divisors is an integer number (230916).

2⁹⁰¹⁶³¹ is an apocalyptic number.

901631 is a deficient number, since it is larger than the sum of its proper divisors (22033).

901631 is a wasteful number, since it uses less digits than its factorization.

901631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22032.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 901631 is about 949.5425214281. The cubic root of 901631 is about 96.6072259754.

The spelling of 901631 in words is "nine hundred one thousand, six hundred thirty-one".