72122299 has 4 divisors (see below), whose sum is σ = 73656864. Its totient is φ = 70587736.

The previous prime is 72122293. The next prime is 72122327. The reversal of 72122299 is 99222127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99222127 = 5839 ⋅16993.

It is a cyclic number.

It is not a de Polignac number, because 72122299 - 2⁹ = 72121787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72122293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767212 + ... + 767305.

It is an arithmetic number, because the mean of its divisors is an integer number (18414216).

Almost surely, 2^72122299 is an apocalyptic number.

72122299 is a deficient number, since it is larger than the sum of its proper divisors (1534565).

72122299 is a wasteful number, since it uses less digits than its factorization.

72122299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534564.

The product of its digits is 9072, while the sum is 34.

The square root of 72122299 is about 8492.4848542697. The cubic root of 72122299 is about 416.2521796758.

The spelling of 72122299 in words is "seventy-two million, one hundred twenty-two thousand, two hundred ninety-nine".