72122399 has 8 divisors (see below), whose sum is σ = 74696832. Its totient is φ = 69563520.

The previous prime is 72122389. The next prime is 72122431. The reversal of 72122399 is 99322127.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72122399 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 (72122329) 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, 5987 + ... + 13419.

It is an arithmetic number, because the mean of its divisors is an integer number (9337104).

Almost surely, 2^72122399 is an apocalyptic number.

72122399 is a deficient number, since it is larger than the sum of its proper divisors (2574433).

72122399 is a wasteful number, since it uses less digits than its factorization.

72122399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7777.

The product of its digits is 13608, while the sum is 35.

The square root of 72122399 is about 8492.4907418260. The cubic root of 72122399 is about 416.2523720583.

The spelling of 72122399 in words is "seventy-two million, one hundred twenty-two thousand, three hundred ninety-nine".