23691229 has 2 divisors, whose sum is σ = 23691230. Its totient is φ = 23691228.

The previous prime is 23691203. The next prime is 23691253. The reversal of 23691229 is 92219632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23059204 + 632025 = 4802^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 23691229 - 2⁹ = 23690717 is a prime.

It is a super-2 number, since 2×23691229² = 1122548663060882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23691194 and 23691203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23691029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11845614 + 11845615.

It is an arithmetic number, because the mean of its divisors is an integer number (11845615).

Almost surely, 2^23691229 is an apocalyptic number.

It is an amenable number.

23691229 is a deficient number, since it is larger than the sum of its proper divisors (1).

23691229 is an equidigital number, since it uses as much as digits as its factorization.

23691229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 23691229 is about 4867.3636601347. The cubic root of 23691229 is about 287.2075574512.

The spelling of 23691229 in words is "twenty-three million, six hundred ninety-one thousand, two hundred twenty-nine".