31613031623 has 2 divisors, whose sum is σ = 31613031624. Its totient is φ = 31613031622.

The previous prime is 31613031599. The next prime is 31613031679. The reversal of 31613031623 is 32613031613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31613031623 - 2¹² = 31613027527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31613033623) 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 as a sum of consecutive naturals, namely, 15806515811 + 15806515812.

It is an arithmetic number, because the mean of its divisors is an integer number (15806515812).

Almost surely, 2^31613031623 is an apocalyptic number.

31613031623 is a deficient number, since it is larger than the sum of its proper divisors (1).

31613031623 is an equidigital number, since it uses as much as digits as its factorization.

31613031623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The spelling of 31613031623 in words is "thirty-one billion, six hundred thirteen million, thirty-one thousand, six hundred twenty-three".