22047397 has 2 divisors, whose sum is σ = 22047398. Its totient is φ = 22047396.

The previous prime is 22047383. The next prime is 22047401. The reversal of 22047397 is 79374022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21520321 + 527076 = 4639^2 + 726^2 .

It is a cyclic number.

It is not a de Polignac number, because 22047397 - 2⁷ = 22047269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22047307) 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, 11023698 + 11023699.

It is an arithmetic number, because the mean of its divisors is an integer number (11023699).

Almost surely, 2^22047397 is an apocalyptic number.

It is an amenable number.

22047397 is a deficient number, since it is larger than the sum of its proper divisors (1).

22047397 is an equidigital number, since it uses as much as digits as its factorization.

22047397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 22047397 is about 4695.4655786194. The cubic root of 22047397 is about 280.4050133651.

The spelling of 22047397 in words is "twenty-two million, forty-seven thousand, three hundred ninety-seven".