31349113 has 4 divisors (see below), whose sum is σ = 31415040. Its totient is φ = 31283188.

The previous prime is 31349083. The next prime is 31349167. The reversal of 31349113 is 31194313.

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: 31194313 = 2069 ⋅15077.

It is a cyclic number.

It is not a de Polignac number, because 31349113 - 2⁹ = 31348601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31341113) 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, 32245 + ... + 33202.

It is an arithmetic number, because the mean of its divisors is an integer number (7853760).

Almost surely, 2^31349113 is an apocalyptic number.

It is an amenable number.

31349113 is a deficient number, since it is larger than the sum of its proper divisors (65927).

31349113 is an equidigital number, since it uses as much as digits as its factorization.

31349113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65926.

The product of its digits is 972, while the sum is 25.

The square root of 31349113 is about 5599.0278620489. The cubic root of 31349113 is about 315.3129098580.

The spelling of 31349113 in words is "thirty-one million, three hundred forty-nine thousand, one hundred thirteen".