22779609 has 16 divisors (see below), whose sum is σ = 32421888. Its totient is φ = 14176512.

The previous prime is 22779563. The next prime is 22779611. The reversal of 22779609 is 90697722.

It is not a de Polignac number, because 22779609 - 2⁷ = 22779481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22779109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4719 + ... + 8235.

It is an arithmetic number, because the mean of its divisors is an integer number (2026368).

Almost surely, 2^22779609 is an apocalyptic number.

It is an amenable number.

22779609 is a deficient number, since it is larger than the sum of its proper divisors (9642279).

22779609 is a wasteful number, since it uses less digits than its factorization.

22779609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 22779609 is about 4772.7988643981. The cubic root of 22779609 is about 283.4754293783.

The spelling of 22779609 in words is "twenty-two million, seven hundred seventy-nine thousand, six hundred nine".