72715867 has 4 divisors (see below), whose sum is σ = 83103856. Its totient is φ = 62327880.

The previous prime is 72715849. The next prime is 72715883. The reversal of 72715867 is 76851727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76851727 = 1901 ⋅40427.

It is a cyclic number.

It is not a de Polignac number, because 72715867 - 2¹⁵ = 72683099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72715897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5193984 + ... + 5193997.

It is an arithmetic number, because the mean of its divisors is an integer number (20775964).

Almost surely, 2^72715867 is an apocalyptic number.

72715867 is a deficient number, since it is larger than the sum of its proper divisors (10387989).

72715867 is a wasteful number, since it uses less digits than its factorization.

72715867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10387988.

The product of its digits is 164640, while the sum is 43.

The square root of 72715867 is about 8527.3599079668. The cubic root of 72715867 is about 417.3909825677.

The spelling of 72715867 in words is "seventy-two million, seven hundred fifteen thousand, eight hundred sixty-seven".