23972609 has 4 divisors (see below), whose sum is σ = 24131520. Its totient is φ = 23813700.

The previous prime is 23972603. The next prime is 23972621. The reversal of 23972609 is 90627932.

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 23972609 - 2⁴ = 23972593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23972603) 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, 79229 + ... + 79530.

It is an arithmetic number, because the mean of its divisors is an integer number (6032880).

Almost surely, 2^23972609 is an apocalyptic number.

It is an amenable number.

23972609 is a deficient number, since it is larger than the sum of its proper divisors (158911).

23972609 is a wasteful number, since it uses less digits than its factorization.

23972609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158910.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 23972609 is about 4896.1831052362. The cubic root of 23972609 is about 288.3401371273.

The spelling of 23972609 in words is "twenty-three million, nine hundred seventy-two thousand, six hundred nine".