72315707 has 2 divisors, whose sum is σ = 72315708. Its totient is φ = 72315706.

The previous prime is 72315679. The next prime is 72315721. The reversal of 72315707 is 70751327.

It is a strong prime.

It is an emirp because it is prime and its reverse (70751327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72315707 - 2¹⁴ = 72299323 is a prime.

It is a super-2 number, since 2×72315707² = 10459122957819698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72315787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36157853 + 36157854.

It is an arithmetic number, because the mean of its divisors is an integer number (36157854).

Almost surely, 2^72315707 is an apocalyptic number.

72315707 is a deficient number, since it is larger than the sum of its proper divisors (1).

72315707 is an equidigital number, since it uses as much as digits as its factorization.

72315707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10290, while the sum is 32.

The square root of 72315707 is about 8503.8642392738. The cubic root of 72315707 is about 416.6239308347.

The spelling of 72315707 in words is "seventy-two million, three hundred fifteen thousand, seven hundred seven".