31698113 has 4 divisors (see below), whose sum is σ = 31857600. Its totient is φ = 31538628.

The previous prime is 31698109. The next prime is 31698119. The reversal of 31698113 is 31189613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31698113 - 2² = 31698109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31698113.

It is not an unprimeable number, because it can be changed into a prime (31698119) 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 3 ways as a sum of consecutive naturals, for example, 79445 + ... + 79842.

It is an arithmetic number, because the mean of its divisors is an integer number (7964400).

Almost surely, 2^31698113 is an apocalyptic number.

It is an amenable number.

31698113 is a deficient number, since it is larger than the sum of its proper divisors (159487).

31698113 is a wasteful number, since it uses less digits than its factorization.

31698113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159486.

The product of its digits is 3888, while the sum is 32.

The square root of 31698113 is about 5630.1077254347. The cubic root of 31698113 is about 316.4786881888.

The spelling of 31698113 in words is "thirty-one million, six hundred ninety-eight thousand, one hundred thirteen".