31678113 has 4 divisors (see below), whose sum is σ = 42237488. Its totient is φ = 21118740.

The previous prime is 31678091. The next prime is 31678133. The reversal of 31678113 is 31187613.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31187613 = 3 ⋅10395871.

It is not a de Polignac number, because 31678113 - 2²¹ = 29580961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31678133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5279683 + ... + 5279688.

It is an arithmetic number, because the mean of its divisors is an integer number (10559372).

Almost surely, 2^31678113 is an apocalyptic number.

It is an amenable number.

31678113 is a deficient number, since it is larger than the sum of its proper divisors (10559375).

31678113 is a wasteful number, since it uses less digits than its factorization.

31678113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10559374.

The product of its digits is 3024, while the sum is 30.

The square root of 31678113 is about 5628.3312802286. The cubic root of 31678113 is about 316.4121131905.

The spelling of 31678113 in words is "thirty-one million, six hundred seventy-eight thousand, one hundred thirteen".