72097439 has 2 divisors, whose sum is σ = 72097440. Its totient is φ = 72097438.

The previous prime is 72097397. The next prime is 72097453. The reversal of 72097439 is 93479027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72097439 - 2⁸ = 72097183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72097396 and 72097405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72097499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36048719 + 36048720.

It is an arithmetic number, because the mean of its divisors is an integer number (36048720).

Almost surely, 2^72097439 is an apocalyptic number.

72097439 is a deficient number, since it is larger than the sum of its proper divisors (1).

72097439 is an equidigital number, since it uses as much as digits as its factorization.

72097439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 72097439 is about 8491.0210811186. The cubic root of 72097439 is about 416.2043478747.

The spelling of 72097439 in words is "seventy-two million, ninety-seven thousand, four hundred thirty-nine".