22137979 has 4 divisors (see below), whose sum is σ = 22344984. Its totient is φ = 21930976.

The previous prime is 22137971. The next prime is 22137989. The reversal of 22137979 is 97973122.

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 22137979 - 2³ = 22137971 is a prime.

It is a super-2 number, since 2×22137979² = 980180228408882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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 not an unprimeable number, because it can be changed into a prime (22137971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103342 + ... + 103555.

It is an arithmetic number, because the mean of its divisors is an integer number (5586246).

Almost surely, 2^22137979 is an apocalyptic number.

22137979 is a deficient number, since it is larger than the sum of its proper divisors (207005).

22137979 is a wasteful number, since it uses less digits than its factorization.

22137979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207004.

The product of its digits is 47628, while the sum is 40.

The square root of 22137979 is about 4705.1013804168. The cubic root of 22137979 is about 280.7885044590.

The spelling of 22137979 in words is "twenty-two million, one hundred thirty-seven thousand, nine hundred seventy-nine".