22997971 has 2 divisors, whose sum is σ = 22997972. Its totient is φ = 22997970.

The previous prime is 22997963. The next prime is 22997981. The reversal of 22997971 is 17979922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22997971 - 2³ = 22997963 is a prime.

It is not a weakly prime, because it can be changed into another prime (22997911) 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, 11498985 + 11498986.

It is an arithmetic number, because the mean of its divisors is an integer number (11498986).

Almost surely, 2^22997971 is an apocalyptic number.

22997971 is a deficient number, since it is larger than the sum of its proper divisors (1).

22997971 is an equidigital number, since it uses as much as digits as its factorization.

22997971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 46.

The square root of 22997971 is about 4795.6199807741. The cubic root of 22997971 is about 284.3783351217.

The spelling of 22997971 in words is "twenty-two million, nine hundred ninety-seven thousand, nine hundred seventy-one".