22697237 has 2 divisors, whose sum is σ = 22697238. Its totient is φ = 22697236.

The previous prime is 22697221. The next prime is 22697273. The reversal of 22697237 is 73279622.

It is a happy number.

Together with next prime (22697273) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22600516 + 96721 = 4754^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 22697237 - 2⁴ = 22697221 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 22697237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22697537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11348618 + 11348619.

It is an arithmetic number, because the mean of its divisors is an integer number (11348619).

Almost surely, 2^22697237 is an apocalyptic number.

It is an amenable number.

22697237 is a deficient number, since it is larger than the sum of its proper divisors (1).

22697237 is an equidigital number, since it uses as much as digits as its factorization.

22697237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 38.

The square root of 22697237 is about 4764.1617310918. The cubic root of 22697237 is about 283.1333304405.

The spelling of 22697237 in words is "twenty-two million, six hundred ninety-seven thousand, two hundred thirty-seven".