72546839 has 4 divisors (see below), whose sum is σ = 72589224. Its totient is φ = 72504456.

The previous prime is 72546821. The next prime is 72546841. The reversal of 72546839 is 93864527.

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

It is a cyclic number.

It is not a de Polignac number, because 72546839 - 2²⁰ = 71498263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72546839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72546809) 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, 18512 + ... + 22085.

It is an arithmetic number, because the mean of its divisors is an integer number (18147306).

Almost surely, 2^72546839 is an apocalyptic number.

72546839 is a deficient number, since it is larger than the sum of its proper divisors (42385).

72546839 is a wasteful number, since it uses less digits than its factorization.

72546839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42384.

The product of its digits is 362880, while the sum is 44.

The square root of 72546839 is about 8517.4432196522. The cubic root of 72546839 is about 417.0673232726.

The spelling of 72546839 in words is "seventy-two million, five hundred forty-six thousand, eight hundred thirty-nine".