22138679 has 4 divisors (see below), whose sum is σ = 22653576. Its totient is φ = 21623784.

The previous prime is 22138651. The next prime is 22138733. The reversal of 22138679 is 97683122.

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 22138679 - 2⁸ = 22138423 is a prime.

It is a super-2 number, since 2×22138679² = 980242215730082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22138279) 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, 257384 + ... + 257469.

It is an arithmetic number, because the mean of its divisors is an integer number (5663394).

Almost surely, 2^22138679 is an apocalyptic number.

22138679 is a deficient number, since it is larger than the sum of its proper divisors (514897).

22138679 is an equidigital number, since it uses as much as digits as its factorization.

22138679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514896.

The product of its digits is 36288, while the sum is 38.

The square root of 22138679 is about 4705.1757671738. The cubic root of 22138679 is about 280.7914639264.

The spelling of 22138679 in words is "twenty-two million, one hundred thirty-eight thousand, six hundred seventy-nine".