22890977 has 2 divisors, whose sum is σ = 22890978. Its totient is φ = 22890976.

The previous prime is 22890971. The next prime is 22890979. The reversal of 22890977 is 77909822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22619536 + 271441 = 4756^2 + 521^2 .

It is a cyclic number.

It is not a de Polignac number, because 22890977 - 2⁶ = 22890913 is a prime.

Together with 22890979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22890971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11445488 + 11445489.

It is an arithmetic number, because the mean of its divisors is an integer number (11445489).

Almost surely, 2^22890977 is an apocalyptic number.

It is an amenable number.

22890977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22890977 is an equidigital number, since it uses as much as digits as its factorization.

22890977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 22890977 is about 4784.4515882178. The cubic root of 22890977 is about 283.9366427801.

The spelling of 22890977 in words is "twenty-two million, eight hundred ninety thousand, nine hundred seventy-seven".