72715393 has 2 divisors, whose sum is σ = 72715394. Its totient is φ = 72715392.

The previous prime is 72715369. The next prime is 72715457. The reversal of 72715393 is 39351727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68359824 + 4355569 = 8268^2 + 2087^2 .

It is a cyclic number.

It is not a de Polignac number, because 72715393 - 2⁵ = 72715361 is a prime.

It is not a weakly prime, because it can be changed into another prime (72715333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36357696 + 36357697.

It is an arithmetic number, because the mean of its divisors is an integer number (36357697).

Almost surely, 2^72715393 is an apocalyptic number.

It is an amenable number.

72715393 is a deficient number, since it is larger than the sum of its proper divisors (1).

72715393 is an equidigital number, since it uses as much as digits as its factorization.

72715393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39690, while the sum is 37.

The square root of 72715393 is about 8527.3321150287. The cubic root of 72715393 is about 417.3900756416.

The spelling of 72715393 in words is "seventy-two million, seven hundred fifteen thousand, three hundred ninety-three".