72547879 has 4 divisors (see below), whose sum is σ = 75049560. Its totient is φ = 70046200.

The previous prime is 72547873. The next prime is 72547897. The reversal of 72547879 is 97874527.

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 72547879 - 2⁵ = 72547847 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 (72547873) 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, 1250797 + ... + 1250854.

It is an arithmetic number, because the mean of its divisors is an integer number (18762390).

Almost surely, 2^72547879 is an apocalyptic number.

72547879 is a deficient number, since it is larger than the sum of its proper divisors (2501681).

72547879 is a wasteful number, since it uses less digits than its factorization.

72547879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501680.

The product of its digits is 987840, while the sum is 49.

The square root of 72547879 is about 8517.5042706182. The cubic root of 72547879 is about 417.0693162284.

The spelling of 72547879 in words is "seventy-two million, five hundred forty-seven thousand, eight hundred seventy-nine".