72022099 has 4 divisors (see below), whose sum is σ = 72134064. Its totient is φ = 71910136.

The previous prime is 72022079. The next prime is 72022123. The reversal of 72022099 is 99022027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72022099 - 2¹⁵ = 71989331 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 72022099.

It is not an unprimeable number, because it can be changed into a prime (72022079) 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, 55012 + ... + 56305.

It is an arithmetic number, because the mean of its divisors is an integer number (18033516).

Almost surely, 2^72022099 is an apocalyptic number.

72022099 is a deficient number, since it is larger than the sum of its proper divisors (111965).

72022099 is a wasteful number, since it uses less digits than its factorization.

72022099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111964.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 72022099 is about 8486.5834703961. The cubic root of 72022099 is about 416.0593230087.

The spelling of 72022099 in words is "seventy-two million, twenty-two thousand, ninety-nine".