72321879 has 16 divisors (see below), whose sum is σ = 110389248. Its totient is φ = 41257632.

The previous prime is 72321869. The next prime is 72321881. The reversal of 72321879 is 97812327.

It is not a de Polignac number, because 72321879 - 2⁹ = 72321367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72321869) 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, 11674 + ... + 16760.

It is an arithmetic number, because the mean of its divisors is an integer number (6899328).

Almost surely, 2^72321879 is an apocalyptic number.

72321879 is a deficient number, since it is larger than the sum of its proper divisors (38067369).

72321879 is a wasteful number, since it uses less digits than its factorization.

72321879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5774.

The product of its digits is 42336, while the sum is 39.

The square root of 72321879 is about 8504.2271253771. The cubic root of 72321879 is about 416.6357831687.

The spelling of 72321879 in words is "seventy-two million, three hundred twenty-one thousand, eight hundred seventy-nine".