22729657 has 2 divisors, whose sum is σ = 22729658. Its totient is φ = 22729656.

The previous prime is 22729631. The next prime is 22729669. The reversal of 22729657 is 75692722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12559936 + 10169721 = 3544^2 + 3189^2 .

It is a cyclic number.

It is not a de Polignac number, because 22729657 - 2¹¹ = 22727609 is a prime.

It is not a weakly prime, because it can be changed into another prime (22729687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11364828 + 11364829.

It is an arithmetic number, because the mean of its divisors is an integer number (11364829).

Almost surely, 2^22729657 is an apocalyptic number.

It is an amenable number.

22729657 is a deficient number, since it is larger than the sum of its proper divisors (1).

22729657 is an equidigital number, since it uses as much as digits as its factorization.

22729657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 22729657 is about 4767.5630043031. The cubic root of 22729657 is about 283.2680724743.

The spelling of 22729657 in words is "twenty-two million, seven hundred twenty-nine thousand, six hundred fifty-seven".