72713779 has 8 divisors (see below), whose sum is σ = 76626000. Its totient is φ = 68810112.

The previous prime is 72713761. The next prime is 72713789. The reversal of 72713779 is 97731727.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72713779 - 2⁷ = 72713651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72713789) 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, 23007 + ... + 25975.

It is an arithmetic number, because the mean of its divisors is an integer number (9578250).

Almost surely, 2^72713779 is an apocalyptic number.

72713779 is a deficient number, since it is larger than the sum of its proper divisors (3912221).

72713779 is a wasteful number, since it uses less digits than its factorization.

72713779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277.

The product of its digits is 129654, while the sum is 43.

The square root of 72713779 is about 8527.2374776360. The cubic root of 72713779 is about 417.3869874712.

The spelling of 72713779 in words is "seventy-two million, seven hundred thirteen thousand, seven hundred seventy-nine".