22238779 has 2 divisors, whose sum is σ = 22238780. Its totient is φ = 22238778.

The previous prime is 22238743. The next prime is 22238789. The reversal of 22238779 is 97783222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22238779 is a prime.

It is not a weakly prime, because it can be changed into another prime (22238729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11119389 + 11119390.

It is an arithmetic number, because the mean of its divisors is an integer number (11119390).

Almost surely, 2^22238779 is an apocalyptic number.

22238779 is a deficient number, since it is larger than the sum of its proper divisors (1).

22238779 is an equidigital number, since it uses as much as digits as its factorization.

22238779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 22238779 is about 4715.8009924084. The cubic root of 22238779 is about 281.2140270699.

The spelling of 22238779 in words is "twenty-two million, two hundred thirty-eight thousand, seven hundred seventy-nine".