72422979 has 8 divisors (see below), whose sum is σ = 97450320. Its totient is φ = 47838816.

The previous prime is 72422971. The next prime is 72422981. The reversal of 72422979 is 97922427.

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

It is not a de Polignac number, because 72422979 - 2³ = 72422971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72422979.

It is not an unprimeable number, because it can be changed into a prime (72422971) 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, 110412 + ... + 111065.

It is an arithmetic number, because the mean of its divisors is an integer number (12181290).

Almost surely, 2^72422979 is an apocalyptic number.

72422979 is a deficient number, since it is larger than the sum of its proper divisors (25027341).

72422979 is a wasteful number, since it uses less digits than its factorization.

72422979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221589.

The product of its digits is 127008, while the sum is 42.

The square root of 72422979 is about 8510.1691522554. The cubic root of 72422979 is about 416.8298335532.

The spelling of 72422979 in words is "seventy-two million, four hundred twenty-two thousand, nine hundred seventy-nine".