31745923 has 24 divisors (see below), whose sum is σ = 36867600. Its totient is φ = 27276480.

The previous prime is 31745921. The next prime is 31745927. The reversal of 31745923 is 32954713.

It is not a de Polignac number, because 31745923 - 2¹ = 31745921 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (31745921) 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 23 ways as a sum of consecutive naturals, for example, 291193 + ... + 291301.

It is an arithmetic number, because the mean of its divisors is an integer number (1536150).

Almost surely, 2^31745923 is an apocalyptic number.

31745923 is a deficient number, since it is larger than the sum of its proper divisors (5121677).

31745923 is a wasteful number, since it uses less digits than its factorization.

31745923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 232 counting only the distinct ones).

The product of its digits is 22680, while the sum is 34.

The square root of 31745923 is about 5634.3520479288. The cubic root of 31745923 is about 316.6377223160.

The spelling of 31745923 in words is "thirty-one million, seven hundred forty-five thousand, nine hundred twenty-three".