22685977 has 2 divisors, whose sum is σ = 22685978. Its totient is φ = 22685976.

The previous prime is 22685969. The next prime is 22685989. The reversal of 22685977 is 77958622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20985561 + 1700416 = 4581^2 + 1304^2 .

It is a cyclic number.

It is not a de Polignac number, because 22685977 - 2³ = 22685969 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22685077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11342988 + 11342989.

It is an arithmetic number, because the mean of its divisors is an integer number (11342989).

Almost surely, 2^22685977 is an apocalyptic number.

It is an amenable number.

22685977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22685977 is an equidigital number, since it uses as much as digits as its factorization.

22685977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 46.

The square root of 22685977 is about 4762.9798445931. The cubic root of 22685977 is about 283.0865022936.

The spelling of 22685977 in words is "twenty-two million, six hundred eighty-five thousand, nine hundred seventy-seven".