72739779 has 16 divisors (see below), whose sum is σ = 111002880. Its totient is φ = 41505120.

The previous prime is 72739763. The next prime is 72739783. The reversal of 72739779 is 97793727.

It is not a de Polignac number, because 72739779 - 2⁴ = 72739763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72739759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15132 + ... + 19350.

It is an arithmetic number, because the mean of its divisors is an integer number (6937680).

Almost surely, 2^72739779 is an apocalyptic number.

72739779 is a deficient number, since it is larger than the sum of its proper divisors (38263101).

72739779 is a wasteful number, since it uses less digits than its factorization.

72739779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050.

The product of its digits is 1166886, while the sum is 51.

The square root of 72739779 is about 8528.7618679384. The cubic root of 72739779 is about 417.4367293892.

The spelling of 72739779 in words is "seventy-two million, seven hundred thirty-nine thousand, seven hundred seventy-nine".