23257609 has 4 divisors (see below), whose sum is σ = 23435280. Its totient is φ = 23079940.

The previous prime is 23257607. The next prime is 23257613. The reversal of 23257609 is 90675232.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23257609 - 2¹ = 23257607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23257603) 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, 88639 + ... + 88900.

It is an arithmetic number, because the mean of its divisors is an integer number (5858820).

Almost surely, 2^23257609 is an apocalyptic number.

It is an amenable number.

23257609 is a deficient number, since it is larger than the sum of its proper divisors (177671).

23257609 is a wasteful number, since it uses less digits than its factorization.

23257609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177670.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 23257609 is about 4822.6143324964. The cubic root of 23257609 is about 285.4445059057. Note that the first 3 decimals are identical.

The spelling of 23257609 in words is "twenty-three million, two hundred fifty-seven thousand, six hundred nine".