22981779 has 8 divisors (see below), whose sum is σ = 34047120. Its totient is φ = 15321168.

The previous prime is 22981769. The next prime is 22981789. The reversal of 22981779 is 97718922.

It is an interprime number because it is at equal distance from previous prime (22981769) and next prime (22981789).

It is not a de Polignac number, because 22981779 - 2¹¹ = 22979731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22981709) 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, 425562 + ... + 425615.

It is an arithmetic number, because the mean of its divisors is an integer number (4255890).

Almost surely, 2^22981779 is an apocalyptic number.

22981779 is a deficient number, since it is larger than the sum of its proper divisors (11065341).

22981779 is an equidigital number, since it uses as much as digits as its factorization.

22981779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851186 (or 851180 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 22981779 is about 4793.9314763563. The cubic root of 22981779 is about 284.3115794489.

The spelling of 22981779 in words is "twenty-two million, nine hundred eighty-one thousand, seven hundred seventy-nine".