22729769 has 2 divisors, whose sum is σ = 22729770. Its totient is φ = 22729768.

The previous prime is 22729753. The next prime is 22729781. The reversal of 22729769 is 96792722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 3193369 = 4420^2 + 1787^2 .

It is a cyclic number.

It is not a de Polignac number, because 22729769 - 2⁴ = 22729753 is a prime.

It is a super-2 number, since 2×22729769² = 1033284797586722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22729709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11364884 + 11364885.

It is an arithmetic number, because the mean of its divisors is an integer number (11364885).

Almost surely, 2^22729769 is an apocalyptic number.

It is an amenable number.

22729769 is a deficient number, since it is larger than the sum of its proper divisors (1).

22729769 is an equidigital number, since it uses as much as digits as its factorization.

22729769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 22729769 is about 4767.5747503317. The cubic root of 22729769 is about 283.2685377397.

The spelling of 22729769 in words is "twenty-two million, seven hundred twenty-nine thousand, seven hundred sixty-nine".