22397971 has 2 divisors, whose sum is σ = 22397972. Its totient is φ = 22397970.

The previous prime is 22397957. The next prime is 22397983. The reversal of 22397971 is 17979322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22397971 - 2²³ = 14009363 is a prime.

It is not a weakly prime, because it can be changed into another prime (22397911) 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, 11198985 + 11198986.

It is an arithmetic number, because the mean of its divisors is an integer number (11198986).

Almost surely, 2^22397971 is an apocalyptic number.

22397971 is a deficient number, since it is larger than the sum of its proper divisors (1).

22397971 is an equidigital number, since it uses as much as digits as its factorization.

22397971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 40.

The square root of 22397971 is about 4732.6494693776. The cubic root of 22397971 is about 281.8834377345.

The spelling of 22397971 in words is "twenty-two million, three hundred ninety-seven thousand, nine hundred seventy-one".