72679679 has 4 divisors (see below), whose sum is σ = 73322976. Its totient is φ = 72036384.

The previous prime is 72679639. The next prime is 72679699. The reversal of 72679679 is 97697627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97697627 = 293 ⋅333439.

It is a cyclic number.

It is not a de Polignac number, because 72679679 - 2²⁰ = 71631103 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 72679679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72679639) 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 3 ways as a sum of consecutive naturals, for example, 321479 + ... + 321704.

It is an arithmetic number, because the mean of its divisors is an integer number (18330744).

Almost surely, 2^72679679 is an apocalyptic number.

72679679 is a deficient number, since it is larger than the sum of its proper divisors (643297).

72679679 is a wasteful number, since it uses less digits than its factorization.

72679679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643296.

The product of its digits is 2000376, while the sum is 53.

The square root of 72679679 is about 8525.2377679452. The cubic root of 72679679 is about 417.3217310556.

The spelling of 72679679 in words is "seventy-two million, six hundred seventy-nine thousand, six hundred seventy-nine".