22139393 has 4 divisors (see below), whose sum is σ = 22308528. Its totient is φ = 21970260.

The previous prime is 22139371. The next prime is 22139407. The reversal of 22139393 is 39393122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39393122 = 2 ⋅19696561.

It is a cyclic number.

It is not a de Polignac number, because 22139393 - 2⁸ = 22139137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22139323) 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, 84371 + ... + 84632.

It is an arithmetic number, because the mean of its divisors is an integer number (5577132).

Almost surely, 2^22139393 is an apocalyptic number.

It is an amenable number.

22139393 is a deficient number, since it is larger than the sum of its proper divisors (169135).

22139393 is a wasteful number, since it uses less digits than its factorization.

22139393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169134.

The product of its digits is 8748, while the sum is 32.

The square root of 22139393 is about 4705.2516404545. The cubic root of 22139393 is about 280.7944825189.

The spelling of 22139393 in words is "twenty-two million, one hundred thirty-nine thousand, three hundred ninety-three".