31916969 has 8 divisors (see below), whose sum is σ = 37075008. Its totient is φ = 26908560.

The previous prime is 31916947. The next prime is 31916993. The reversal of 31916969 is 96961913.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31916969 - 2²⁰ = 30868393 is a prime.

It is a super-2 number, since 2×31916969² = 2037385820293922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31916999) 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 7 ways as a sum of consecutive naturals, for example, 36947 + ... + 37800.

It is an arithmetic number, because the mean of its divisors is an integer number (4634376).

Almost surely, 2^31916969 is an apocalyptic number.

It is an amenable number.

31916969 is a deficient number, since it is larger than the sum of its proper divisors (5158039).

31916969 is an equidigital number, since it uses as much as digits as its factorization.

31916969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74815.

The product of its digits is 78732, while the sum is 44.

The square root of 31916969 is about 5649.5105097699. The cubic root of 31916969 is about 317.2053819373.

The spelling of 31916969 in words is "thirty-one million, nine hundred sixteen thousand, nine hundred sixty-nine".