72575647 has 4 divisors (see below), whose sum is σ = 72684160. Its totient is φ = 72467136.

The previous prime is 72575627. The next prime is 72575663. The reversal of 72575647 is 74657527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72575647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72575627) 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, 53247 + ... + 54592.

It is an arithmetic number, because the mean of its divisors is an integer number (18171040).

Almost surely, 2^72575647 is an apocalyptic number.

72575647 is a deficient number, since it is larger than the sum of its proper divisors (108513).

72575647 is a wasteful number, since it uses less digits than its factorization.

72575647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108512.

The product of its digits is 411600, while the sum is 43.

The square root of 72575647 is about 8519.1341696208. The cubic root of 72575647 is about 417.1225211080.

The spelling of 72575647 in words is "seventy-two million, five hundred seventy-five thousand, six hundred forty-seven".