22147897 has 2 divisors, whose sum is σ = 22147898. Its totient is φ = 22147896.

The previous prime is 22147883. The next prime is 22147903. The reversal of 22147897 is 79874122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22052416 + 95481 = 4696^2 + 309^2 .

It is a cyclic number.

It is not a de Polignac number, because 22147897 - 2¹⁵ = 22115129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22147817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11073948 + 11073949.

It is an arithmetic number, because the mean of its divisors is an integer number (11073949).

Almost surely, 2^22147897 is an apocalyptic number.

It is an amenable number.

22147897 is a deficient number, since it is larger than the sum of its proper divisors (1).

22147897 is an equidigital number, since it uses as much as digits as its factorization.

22147897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 22147897 is about 4706.1552248093. The cubic root of 22147897 is about 280.8304300658.

The spelling of 22147897 in words is "twenty-two million, one hundred forty-seven thousand, eight hundred ninety-seven".