72791497 has 2 divisors, whose sum is σ = 72791498. Its totient is φ = 72791496.

The previous prime is 72791491. The next prime is 72791507. The reversal of 72791497 is 79419727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37222201 + 35569296 = 6101^2 + 5964^2 .

It is a cyclic number.

It is not a de Polignac number, because 72791497 - 2²³ = 64402889 is a prime.

It is not a weakly prime, because it can be changed into another prime (72791491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36395748 + 36395749.

It is an arithmetic number, because the mean of its divisors is an integer number (36395749).

Almost surely, 2^72791497 is an apocalyptic number.

It is an amenable number.

72791497 is a deficient number, since it is larger than the sum of its proper divisors (1).

72791497 is an equidigital number, since it uses as much as digits as its factorization.

72791497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 46.

The square root of 72791497 is about 8531.7933050444. The cubic root of 72791497 is about 417.5356384891.

The spelling of 72791497 in words is "seventy-two million, seven hundred ninety-one thousand, four hundred ninety-seven".