31313797 has 8 divisors (see below), whose sum is σ = 32107392. Its totient is φ = 30525600.

The previous prime is 31313771. The next prime is 31313809. The reversal of 31313797 is 79731313.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31313797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12022 + ... + 14392.

It is an arithmetic number, because the mean of its divisors is an integer number (4013424).

Almost surely, 2^31313797 is an apocalyptic number.

It is an amenable number.

31313797 is a deficient number, since it is larger than the sum of its proper divisors (793595).

31313797 is a wasteful number, since it uses less digits than its factorization.

31313797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2699.

The product of its digits is 11907, while the sum is 34.

The square root of 31313797 is about 5595.8732115730. The cubic root of 31313797 is about 315.1944612658.

The spelling of 31313797 in words is "thirty-one million, three hundred thirteen thousand, seven hundred ninety-seven".