31374993 has 32 divisors (see below), whose sum is σ = 47101824. Its totient is φ = 18450432.

The previous prime is 31374983. The next prime is 31375009. The reversal of 31374993 is 39947313.

It is not a de Polignac number, because 31374993 - 2⁹ = 31374481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (31374953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88705 + ... + 89057.

It is an arithmetic number, because the mean of its divisors is an integer number (1471932).

Almost surely, 2^31374993 is an apocalyptic number.

It is an amenable number.

31374993 is a deficient number, since it is larger than the sum of its proper divisors (15726831).

31374993 is a wasteful number, since it uses less digits than its factorization.

31374993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465.

The product of its digits is 61236, while the sum is 39.

The square root of 31374993 is about 5601.3385007514. The cubic root of 31374993 is about 315.3996539771.

The spelling of 31374993 in words is "thirty-one million, three hundred seventy-four thousand, nine hundred ninety-three".