31197793 has 12 divisors (see below), whose sum is σ = 34689060. Its totient is φ = 28033280.

The previous prime is 31197767. The next prime is 31197799. The reversal of 31197793 is 39779113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4695889 + 26501904 = 2167^2 + 5148^2 .

It is not a de Polignac number, because 31197793 - 2⁹ = 31197281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31197799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9321 + ... + 12217.

It is an arithmetic number, because the mean of its divisors is an integer number (2890755).

Almost surely, 2^31197793 is an apocalyptic number.

It is an amenable number.

31197793 is a deficient number, since it is larger than the sum of its proper divisors (3491267).

31197793 is a wasteful number, since it uses less digits than its factorization.

31197793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3008 (or 2997 counting only the distinct ones).

The product of its digits is 35721, while the sum is 40.

The square root of 31197793 is about 5585.4984558229. The cubic root of 31197793 is about 314.8047601759.

The spelling of 31197793 in words is "thirty-one million, one hundred ninety-seven thousand, seven hundred ninety-three".