22139379 has 8 divisors (see below), whose sum is σ = 32799120. Its totient is φ = 14759568.

The previous prime is 22139371. The next prime is 22139407. The reversal of 22139379 is 97393122.

It is not a de Polignac number, because 22139379 - 2³ = 22139371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22139371) 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, 409962 + ... + 410015.

It is an arithmetic number, because the mean of its divisors is an integer number (4099890).

Almost surely, 2^22139379 is an apocalyptic number.

22139379 is a deficient number, since it is larger than the sum of its proper divisors (10659741).

22139379 is an equidigital number, since it uses as much as digits as its factorization.

22139379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819986 (or 819980 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 22139379 is about 4705.2501527549. The cubic root of 22139379 is about 280.7944233314.

The spelling of 22139379 in words is "twenty-two million, one hundred thirty-nine thousand, three hundred seventy-nine".