72424309693 has 2 divisors, whose sum is σ = 72424309694. Its totient is φ = 72424309692.

The previous prime is 72424309679. The next prime is 72424309697. The reversal of 72424309693 is 39690342427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53899194244 + 18525115449 = 232162^2 + 136107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72424309693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72424309697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36212154846 + 36212154847.

It is an arithmetic number, because the mean of its divisors is an integer number (36212154847).

Almost surely, 2^72424309693 is an apocalyptic number.

It is an amenable number.

72424309693 is a deficient number, since it is larger than the sum of its proper divisors (1).

72424309693 is an equidigital number, since it uses as much as digits as its factorization.

72424309693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 49.

The spelling of 72424309693 in words is "seventy-two billion, four hundred twenty-four million, three hundred nine thousand, six hundred ninety-three".