23489509 has 4 divisors (see below), whose sum is σ = 24510816. Its totient is φ = 22468204.

The previous prime is 23489489. The next prime is 23489527. The reversal of 23489509 is 90598432.

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 23489509 - 2⁷ = 23489381 is a prime.

It is a super-2 number, since 2×23489509² = 1103514066122162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23489549) 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, 510619 + ... + 510664.

It is an arithmetic number, because the mean of its divisors is an integer number (6127704).

Almost surely, 2^23489509 is an apocalyptic number.

It is an amenable number.

23489509 is a deficient number, since it is larger than the sum of its proper divisors (1021307).

23489509 is a wasteful number, since it uses less digits than its factorization.

23489509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021306.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 23489509 is about 4846.5976725947. The cubic root of 23489509 is about 286.3900858290.

The spelling of 23489509 in words is "twenty-three million, four hundred eighty-nine thousand, five hundred nine".