31976913 has 4 divisors (see below), whose sum is σ = 42635888. Its totient is φ = 21317940.

The previous prime is 31976897. The next prime is 31976927. The reversal of 31976913 is 31967913.

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 not a de Polignac number, because 31976913 - 2⁴ = 31976897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31976933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5329483 + ... + 5329488.

It is an arithmetic number, because the mean of its divisors is an integer number (10658972).

Almost surely, 2^31976913 is an apocalyptic number.

It is an amenable number.

31976913 is a deficient number, since it is larger than the sum of its proper divisors (10658975).

31976913 is a wasteful number, since it uses less digits than its factorization.

31976913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10658974.

The product of its digits is 30618, while the sum is 39.

The square root of 31976913 is about 5654.8132595162. The cubic root of 31976913 is about 317.4038413412.

The spelling of 31976913 in words is "thirty-one million, nine hundred seventy-six thousand, nine hundred thirteen".