22771939 has 2 divisors, whose sum is σ = 22771940. Its totient is φ = 22771938.

The previous prime is 22771921. The next prime is 22771979. The reversal of 22771939 is 93917722.

It is an a-pointer prime, because the next prime (22771979) can be obtained adding 22771939 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22771939 - 2⁵ = 22771907 is a prime.

It is a super-2 number, since 2×22771939² = 1037122411639442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22771919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11385969 + 11385970.

It is an arithmetic number, because the mean of its divisors is an integer number (11385970).

Almost surely, 2^22771939 is an apocalyptic number.

22771939 is a deficient number, since it is larger than the sum of its proper divisors (1).

22771939 is an equidigital number, since it uses as much as digits as its factorization.

22771939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 40.

The square root of 22771939 is about 4771.9952849935. The cubic root of 22771939 is about 283.4436099762.

The spelling of 22771939 in words is "twenty-two million, seven hundred seventy-one thousand, nine hundred thirty-nine".