22971647 has 2 divisors, whose sum is σ = 22971648. Its totient is φ = 22971646.

The previous prime is 22971643. The next prime is 22971667. The reversal of 22971647 is 74617922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22971647 - 2² = 22971643 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22971647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22971643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11485823 + 11485824.

It is an arithmetic number, because the mean of its divisors is an integer number (11485824).

Almost surely, 2^22971647 is an apocalyptic number.

22971647 is a deficient number, since it is larger than the sum of its proper divisors (1).

22971647 is an equidigital number, since it uses as much as digits as its factorization.

22971647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 22971647 is about 4792.8746071643. The cubic root of 22971647 is about 284.2697917301.

The spelling of 22971647 in words is "twenty-two million, nine hundred seventy-one thousand, six hundred forty-seven".