72679687 has 4 divisors (see below), whose sum is σ = 73252096. Its totient is φ = 72107280.

The previous prime is 72679639. The next prime is 72679699. The reversal of 72679687 is 78697627.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78697627 = 89 ⋅884243.

It is a cyclic number.

It is not a de Polignac number, because 72679687 - 2⁷ = 72679559 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 (72679627) 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, 286014 + ... + 286267.

It is an arithmetic number, because the mean of its divisors is an integer number (18313024).

Almost surely, 2^72679687 is an apocalyptic number.

72679687 is a deficient number, since it is larger than the sum of its proper divisors (572409).

72679687 is a wasteful number, since it uses less digits than its factorization.

72679687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572408.

The product of its digits is 1778112, while the sum is 52.

The square root of 72679687 is about 8525.2382371404. The cubic root of 72679687 is about 417.3217463674.

The spelling of 72679687 in words is "seventy-two million, six hundred seventy-nine thousand, six hundred eighty-seven".