31933961 has 4 divisors (see below), whose sum is σ = 31997952. Its totient is φ = 31869972.

The previous prime is 31933949. The next prime is 31933963. The reversal of 31933961 is 16933913.

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 31933961 - 2¹⁴ = 31917577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31933963) 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, 31241 + ... + 32246.

It is an arithmetic number, because the mean of its divisors is an integer number (7999488).

Almost surely, 2^31933961 is an apocalyptic number.

It is an amenable number.

31933961 is a deficient number, since it is larger than the sum of its proper divisors (63991).

31933961 is an equidigital number, since it uses as much as digits as its factorization.

31933961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63990.

The product of its digits is 13122, while the sum is 35.

The square root of 31933961 is about 5651.0141567687. The cubic root of 31933961 is about 317.2616633638.

The spelling of 31933961 in words is "thirty-one million, nine hundred thirty-three thousand, nine hundred sixty-one".