31373397 has 12 divisors (see below), whose sum is σ = 49437024. Its totient is φ = 19014120.

The previous prime is 31373387. The next prime is 31373413. The reversal of 31373397 is 79337313.

31373397 is a `hidden beast` number, since 313 + 7 + 339 + 7 = 666.

It is not a de Polignac number, because 31373397 - 2⁷ = 31373269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31373317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158353 + ... + 158550.

It is an arithmetic number, because the mean of its divisors is an integer number (4119752).

Almost surely, 2^31373397 is an apocalyptic number.

It is an amenable number.

31373397 is a deficient number, since it is larger than the sum of its proper divisors (18063627).

31373397 is a wasteful number, since it uses less digits than its factorization.

31373397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316920 (or 316917 counting only the distinct ones).

The product of its digits is 35721, while the sum is 36.

The square root of 31373397 is about 5601.1960329915. The cubic root of 31373397 is about 315.3943059134.

The spelling of 31373397 in words is "thirty-one million, three hundred seventy-three thousand, three hundred ninety-seven".