22939381 has 2 divisors, whose sum is σ = 22939382. Its totient is φ = 22939380.

The previous prime is 22939379. The next prime is 22939391. The reversal of 22939381 is 18393922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17222500 + 5716881 = 4150^2 + 2391^2 .

It is a cyclic number.

It is not a de Polignac number, because 22939381 - 2¹ = 22939379 is a prime.

It is a super-2 number, since 2×22939381² = 1052430401326322, which contains 22 as substring.

Together with 22939379, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22939381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22939321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11469690 + 11469691.

It is an arithmetic number, because the mean of its divisors is an integer number (11469691).

Almost surely, 2^22939381 is an apocalyptic number.

It is an amenable number.

22939381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22939381 is an equidigital number, since it uses as much as digits as its factorization.

22939381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 22939381 is about 4789.5073859427. The cubic root of 22939381 is about 284.1366341481.

The spelling of 22939381 in words is "twenty-two million, nine hundred thirty-nine thousand, three hundred eighty-one".