72397912589 has 2 divisors, whose sum is σ = 72397912590. Its totient is φ = 72397912588.

The previous prime is 72397912579. The next prime is 72397912591. The reversal of 72397912589 is 98521979327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65373796489 + 7024116100 = 255683^2 + 83810^2 .

It is a cyclic number.

It is not a de Polignac number, because 72397912589 - 2²⁰ = 72396864013 is a prime.

Together with 72397912591, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72397912579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36198956294 + 36198956295.

It is an arithmetic number, because the mean of its divisors is an integer number (36198956295).

Almost surely, 2^72397912589 is an apocalyptic number.

It is an amenable number.

72397912589 is a deficient number, since it is larger than the sum of its proper divisors (1).

72397912589 is an equidigital number, since it uses as much as digits as its factorization.

72397912589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17146080, while the sum is 62.

The spelling of 72397912589 in words is "seventy-two billion, three hundred ninety-seven million, nine hundred twelve thousand, five hundred eighty-nine".