72691499 has 2 divisors, whose sum is σ = 72691500. Its totient is φ = 72691498.

The previous prime is 72691459. The next prime is 72691513. The reversal of 72691499 is 99419627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72691499 - 2⁸ = 72691243 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72691459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36345749 + 36345750.

It is an arithmetic number, because the mean of its divisors is an integer number (36345750).

Almost surely, 2^72691499 is an apocalyptic number.

72691499 is a deficient number, since it is larger than the sum of its proper divisors (1).

72691499 is an equidigital number, since it uses as much as digits as its factorization.

72691499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 72691499 is about 8525.9309755592. The cubic root of 72691499 is about 417.3443530390.

The spelling of 72691499 in words is "seventy-two million, six hundred ninety-one thousand, four hundred ninety-nine".