72997619 has 2 divisors, whose sum is σ = 72997620. Its totient is φ = 72997618.

The previous prime is 72997597. The next prime is 72997693. The reversal of 72997619 is 91679927.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72997619 - 2⁸ = 72997363 is a prime.

It is a super-2 number, since 2×72997619² = 10657304759338322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72997019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36498809 + 36498810.

It is an arithmetic number, because the mean of its divisors is an integer number (36498810).

Almost surely, 2^72997619 is an apocalyptic number.

72997619 is a deficient number, since it is larger than the sum of its proper divisors (1).

72997619 is an equidigital number, since it uses as much as digits as its factorization.

72997619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 50.

The square root of 72997619 is about 8543.8644066956. The cubic root of 72997619 is about 417.9293757501.

The spelling of 72997619 in words is "seventy-two million, nine hundred ninety-seven thousand, six hundred nineteen".