72735797 has 2 divisors, whose sum is σ = 72735798. Its totient is φ = 72735796.

The previous prime is 72735787. The next prime is 72735823. The reversal of 72735797 is 79753727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69372241 + 3363556 = 8329^2 + 1834^2 .

It is a cyclic number.

It is not a de Polignac number, because 72735797 - 2⁸ = 72735541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72735787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36367898 + 36367899.

It is an arithmetic number, because the mean of its divisors is an integer number (36367899).

Almost surely, 2^72735797 is an apocalyptic number.

It is an amenable number.

72735797 is a deficient number, since it is larger than the sum of its proper divisors (1).

72735797 is an equidigital number, since it uses as much as digits as its factorization.

72735797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648270, while the sum is 47.

The square root of 72735797 is about 8528.5284193699. The cubic root of 72735797 is about 417.4291119919.

The spelling of 72735797 in words is "seventy-two million, seven hundred thirty-five thousand, seven hundred ninety-seven".