23690389 has 2 divisors, whose sum is σ = 23690390. Its totient is φ = 23690388.

The previous prime is 23690371. The next prime is 23690393. The reversal of 23690389 is 98309632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15539364 + 8151025 = 3942^2 + 2855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23690389 is a prime.

It is a super-2 number, since 2×23690389² = 1122469061942642, which contains 22 as substring.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23690339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11845194 + 11845195.

It is an arithmetic number, because the mean of its divisors is an integer number (11845195).

Almost surely, 2^23690389 is an apocalyptic number.

It is an amenable number.

23690389 is a deficient number, since it is larger than the sum of its proper divisors (1).

23690389 is an equidigital number, since it uses as much as digits as its factorization.

23690389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 23690389 is about 4867.2773703581. The cubic root of 23690389 is about 287.2041629854.

The spelling of 23690389 in words is "twenty-three million, six hundred ninety thousand, three hundred eighty-nine".