23890609 has 4 divisors (see below), whose sum is σ = 23900404. Its totient is φ = 23880816.

The previous prime is 23890597. The next prime is 23890621. The reversal of 23890609 is 90609832.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (23890597) and next prime (23890621).

It can be written as a sum of positive squares in 2 ways, for example, as 5640625 + 18249984 = 2375^2 + 4272^2 .

It is a cyclic number.

It is not a de Polignac number, because 23890609 - 2⁷ = 23890481 is a prime.

It is a super-2 number, since 2×23890609² = 1141522396781762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23890649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1999 + ... + 7195.

It is an arithmetic number, because the mean of its divisors is an integer number (5975101).

Almost surely, 2^23890609 is an apocalyptic number.

It is an amenable number.

23890609 is a deficient number, since it is larger than the sum of its proper divisors (9795).

23890609 is an equidigital number, since it uses as much as digits as its factorization.

23890609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9794.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 23890609 is about 4887.8020622771. The cubic root of 23890609 is about 288.0109989691.

The spelling of 23890609 in words is "twenty-three million, eight hundred ninety thousand, six hundred nine".