22868981 has 2 divisors, whose sum is σ = 22868982. Its totient is φ = 22868980.

The previous prime is 22868977. The next prime is 22868983. The reversal of 22868981 is 18986822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22648081 + 220900 = 4759^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 22868981 - 2² = 22868977 is a prime.

It is a super-2 number, since 2×22868981² = 1045980583956722, which contains 22 as substring.

Together with 22868983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22868983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11434490 + 11434491.

It is an arithmetic number, because the mean of its divisors is an integer number (11434491).

Almost surely, 2^22868981 is an apocalyptic number.

It is an amenable number.

22868981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22868981 is an equidigital number, since it uses as much as digits as its factorization.

22868981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 44.

The square root of 22868981 is about 4782.1523396897. The cubic root of 22868981 is about 283.8456684791.

The spelling of 22868981 in words is "twenty-two million, eight hundred sixty-eight thousand, nine hundred eighty-one".