72974373613 has 2 divisors, whose sum is σ = 72974373614. Its totient is φ = 72974373612.

The previous prime is 72974373607. The next prime is 72974373629. The reversal of 72974373613 is 31637347927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69496558884 + 3477814729 = 263622^2 + 58973^2 .

It is a cyclic number.

It is not a de Polignac number, because 72974373613 - 2²⁹ = 72437502701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72974373313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36487186806 + 36487186807.

It is an arithmetic number, because the mean of its divisors is an integer number (36487186807).

Almost surely, 2^72974373613 is an apocalyptic number.

It is an amenable number.

72974373613 is a deficient number, since it is larger than the sum of its proper divisors (1).

72974373613 is an equidigital number, since it uses as much as digits as its factorization.

72974373613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4000752, while the sum is 52.

The spelling of 72974373613 in words is "seventy-two billion, nine hundred seventy-four million, three hundred seventy-three thousand, six hundred thirteen".