72979239 has 8 divisors (see below), whose sum is σ = 100444672. Its totient is φ = 47083320.

The previous prime is 72979229. The next prime is 72979259. The reversal of 72979239 is 93297927.

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

It is not a de Polignac number, because 72979239 - 2⁴ = 72979223 is a prime.

It is a super-3 number, since 3×72979239³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72979229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392269 + ... + 392454.

It is an arithmetic number, because the mean of its divisors is an integer number (12555584).

Almost surely, 2^72979239 is an apocalyptic number.

72979239 is a deficient number, since it is larger than the sum of its proper divisors (27465433).

72979239 is a wasteful number, since it uses less digits than its factorization.

72979239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784757.

The product of its digits is 428652, while the sum is 48.

The square root of 72979239 is about 8542.7887132950. The cubic root of 72979239 is about 417.8942961277.

The spelling of 72979239 in words is "seventy-two million, nine hundred seventy-nine thousand, two hundred thirty-nine".