23509137 has 16 divisors (see below), whose sum is σ = 33181760. Its totient is φ = 14764032.

The previous prime is 23509127. The next prime is 23509141. The reversal of 23509137 is 73190532.

It is not a de Polignac number, because 23509137 - 2⁴ = 23509121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23509127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9933 + ... + 12069.

It is an arithmetic number, because the mean of its divisors is an integer number (2073860).

Almost surely, 2^23509137 is an apocalyptic number.

It is an amenable number.

23509137 is a deficient number, since it is larger than the sum of its proper divisors (9672623).

23509137 is a wasteful number, since it uses less digits than its factorization.

23509137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 23509137 is about 4848.6221754226. The cubic root of 23509137 is about 286.4698334815.

Adding to 23509137 its reverse (73190532), we get a palindrome (96699669).

The spelling of 23509137 in words is "twenty-three million, five hundred nine thousand, one hundred thirty-seven".