72534000397 has 2 divisors, whose sum is σ = 72534000398. Its totient is φ = 72534000396.

The previous prime is 72534000361. The next prime is 72534000431. The reversal of 72534000397 is 79300043527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71563740196 + 970260201 = 267514^2 + 31149^2 .

It is a cyclic number.

It is not a de Polignac number, because 72534000397 - 2¹¹ = 72533998349 is a prime.

It is a super-2 number, since 2×72534000397² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72534003397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36267000198 + 36267000199.

It is an arithmetic number, because the mean of its divisors is an integer number (36267000199).

Almost surely, 2^72534000397 is an apocalyptic number.

It is an amenable number.

72534000397 is a deficient number, since it is larger than the sum of its proper divisors (1).

72534000397 is an equidigital number, since it uses as much as digits as its factorization.

72534000397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 40.

The spelling of 72534000397 in words is "seventy-two billion, five hundred thirty-four million, three hundred ninety-seven", and thus it is an aban number.