31394623 has 6 divisors (see below), whose sum is σ = 33995544. Its totient is φ = 28979496.

The previous prime is 31394591. The next prime is 31394633. The reversal of 31394623 is 32649313.

It is not a de Polignac number, because 31394623 - 2⁵ = 31394591 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 (31394633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92715 + ... + 93052.

It is an arithmetic number, because the mean of its divisors is an integer number (5665924).

Almost surely, 2^31394623 is an apocalyptic number.

31394623 is a deficient number, since it is larger than the sum of its proper divisors (2600921).

31394623 is a wasteful number, since it uses less digits than its factorization.

31394623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185793 (or 185780 counting only the distinct ones).

The product of its digits is 11664, while the sum is 31.

The square root of 31394623 is about 5603.0904865083. The cubic root of 31394623 is about 315.4654176513.

The spelling of 31394623 in words is "thirty-one million, three hundred ninety-four thousand, six hundred twenty-three".