23990669 has 2 divisors, whose sum is σ = 23990670. Its totient is φ = 23990668.

The previous prime is 23990651. The next prime is 23990671. The reversal of 23990669 is 96609932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16362025 + 7628644 = 4045^2 + 2762^2 .

It is a cyclic number.

It is not a de Polignac number, because 23990669 - 2⁸ = 23990413 is a prime.

It is a super-2 number, since 2×23990669² = 1151104398135122, which contains 22 as substring.

Together with 23990671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23990969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11995334 + 11995335.

It is an arithmetic number, because the mean of its divisors is an integer number (11995335).

Almost surely, 2^23990669 is an apocalyptic number.

It is an amenable number.

23990669 is a deficient number, since it is larger than the sum of its proper divisors (1).

23990669 is an equidigital number, since it uses as much as digits as its factorization.

23990669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 23990669 is about 4898.0270517832. The cubic root of 23990669 is about 288.4125269082.

The spelling of 23990669 in words is "twenty-three million, nine hundred ninety thousand, six hundred sixty-nine".