22679809 has 2 divisors, whose sum is σ = 22679810. Its totient is φ = 22679808.

The previous prime is 22679807. The next prime is 22679821. The reversal of 22679809 is 90897622.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13395600 + 9284209 = 3660^2 + 3047^2 .

It is a cyclic number.

It is not a de Polignac number, because 22679809 - 2¹ = 22679807 is a prime.

Together with 22679807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22679801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11339904 + 11339905.

It is an arithmetic number, because the mean of its divisors is an integer number (11339905).

Almost surely, 2^22679809 is an apocalyptic number.

It is an amenable number.

22679809 is a deficient number, since it is larger than the sum of its proper divisors (1).

22679809 is an equidigital number, since it uses as much as digits as its factorization.

22679809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 22679809 is about 4762.3323067589. The cubic root of 22679809 is about 283.0608442140.

The spelling of 22679809 in words is "twenty-two million, six hundred seventy-nine thousand, eight hundred nine".