72747511 has 8 divisors (see below), whose sum is σ = 73326848. Its totient is φ = 72171000.

The previous prime is 72747503. The next prime is 72747527. The reversal of 72747511 is 11574727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 8-Lehmer number, since φ(72747511) divides (72747511-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 72747511 - 2³ = 72747503 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 (72747011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89296 + ... + 90106.

It is an arithmetic number, because the mean of its divisors is an integer number (9165856).

Almost surely, 2^72747511 is an apocalyptic number.

72747511 is a deficient number, since it is larger than the sum of its proper divisors (579337).

72747511 is a wasteful number, since it uses less digits than its factorization.

72747511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413.

The product of its digits is 13720, while the sum is 34.

The square root of 72747511 is about 8529.2151456040. The cubic root of 72747511 is about 417.4515195837.

The spelling of 72747511 in words is "seventy-two million, seven hundred forty-seven thousand, five hundred eleven".