31896673 has 4 divisors (see below), whose sum is σ = 31907988. Its totient is φ = 31885360.

The previous prime is 31896643. The next prime is 31896677. The reversal of 31896673 is 37669813.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 17698849 + 14197824 = 4207^2 + 3768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31896673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31896677) 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, 2343 + ... + 8323.

It is an arithmetic number, because the mean of its divisors is an integer number (7976997).

Almost surely, 2^31896673 is an apocalyptic number.

It is an amenable number.

31896673 is a deficient number, since it is larger than the sum of its proper divisors (11315).

31896673 is an equidigital number, since it uses as much as digits as its factorization.

31896673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11314.

The product of its digits is 163296, while the sum is 43.

The square root of 31896673 is about 5647.7139623037. The cubic root of 31896673 is about 317.1381307148.

The spelling of 31896673 in words is "thirty-one million, eight hundred ninety-six thousand, six hundred seventy-three".