23090729 has 2 divisors, whose sum is σ = 23090730. Its totient is φ = 23090728.

The previous prime is 23090693. The next prime is 23090737. The reversal of 23090729 is 92709032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23088025 + 2704 = 4805^2 + 52^2 .

It is a cyclic number.

It is not a de Polignac number, because 23090729 - 2¹⁶ = 23025193 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23090695 and 23090704.

It is not a weakly prime, because it can be changed into another prime (23090329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11545364 + 11545365.

It is an arithmetic number, because the mean of its divisors is an integer number (11545365).

Almost surely, 2^23090729 is an apocalyptic number.

It is an amenable number.

23090729 is a deficient number, since it is larger than the sum of its proper divisors (1).

23090729 is an equidigital number, since it uses as much as digits as its factorization.

23090729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 23090729 is about 4805.2813653313. The cubic root of 23090729 is about 284.7601511349.

The spelling of 23090729 in words is "twenty-three million, ninety thousand, seven hundred twenty-nine".