31345493 has 4 divisors (see below), whose sum is σ = 31376928. Its totient is φ = 31314060.

The previous prime is 31345477. The next prime is 31345511. The reversal of 31345493 is 39454313.

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 31345493 - 2⁴ = 31345477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31345403) 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, 14171 + ... + 16232.

It is an arithmetic number, because the mean of its divisors is an integer number (7844232).

Almost surely, 2^31345493 is an apocalyptic number.

It is an amenable number.

31345493 is a deficient number, since it is larger than the sum of its proper divisors (31435).

31345493 is a wasteful number, since it uses less digits than its factorization.

31345493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31434.

The product of its digits is 19440, while the sum is 32.

The square root of 31345493 is about 5598.7045823119. The cubic root of 31345493 is about 315.3007726015.

The spelling of 31345493 in words is "thirty-one million, three hundred forty-five thousand, four hundred ninety-three".