72747057 has 4 divisors (see below), whose sum is σ = 96996080. Its totient is φ = 48498036.

The previous prime is 72747047. The next prime is 72747061. The reversal of 72747057 is 75074727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72747057 - 2⁴ = 72747041 is a prime.

It is a super-2 number, since 2×72747057² = 10584268604322498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72747007) 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, 12124507 + ... + 12124512.

It is an arithmetic number, because the mean of its divisors is an integer number (24249020).

Almost surely, 2^72747057 is an apocalyptic number.

It is an amenable number.

72747057 is a deficient number, since it is larger than the sum of its proper divisors (24249023).

72747057 is a wasteful number, since it uses less digits than its factorization.

72747057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24249022.

The product of its (nonzero) digits is 96040, while the sum is 39.

The square root of 72747057 is about 8529.1885311558. The cubic root of 72747057 is about 417.4506511765.

The spelling of 72747057 in words is "seventy-two million, seven hundred forty-seven thousand, fifty-seven".