31408497 has 12 divisors (see below), whose sum is σ = 45726720. Its totient is φ = 20773368.

The previous prime is 31408493. The next prime is 31408499. The reversal of 31408497 is 79480413.

It is a happy number.

It is not a de Polignac number, because 31408497 - 2² = 31408493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31408493) 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, 12597 + ... + 14882.

It is an arithmetic number, because the mean of its divisors is an integer number (3810560).

Almost surely, 2^31408497 is an apocalyptic number.

It is an amenable number.

31408497 is a deficient number, since it is larger than the sum of its proper divisors (14318223).

31408497 is a wasteful number, since it uses less digits than its factorization.

31408497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27612 (or 27609 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 31408497 is about 5604.3284165009. The cubic root of 31408497 is about 315.5118812621.

The spelling of 31408497 in words is "thirty-one million, four hundred eight thousand, four hundred ninety-seven".