23117137 has 4 divisors (see below), whose sum is σ = 23355556. Its totient is φ = 22878720.

The previous prime is 23117111. The next prime is 23117141. The reversal of 23117137 is 73171132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15713296 + 7403841 = 3964^2 + 2721^2 .

It is a cyclic number.

It is not a de Polignac number, because 23117137 - 2⁷ = 23117009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23117197) 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, 119064 + ... + 119257.

It is an arithmetic number, because the mean of its divisors is an integer number (5838889).

Almost surely, 2^23117137 is an apocalyptic number.

It is an amenable number.

23117137 is a deficient number, since it is larger than the sum of its proper divisors (238419).

23117137 is an equidigital number, since it uses as much as digits as its factorization.

23117137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238418.

The product of its digits is 882, while the sum is 25.

The square root of 23117137 is about 4808.0283900992. The cubic root of 23117137 is about 284.8686662758.

Adding to 23117137 its reverse (73171132), we get a palindrome (96288269).

The spelling of 23117137 in words is "twenty-three million, one hundred seventeen thousand, one hundred thirty-seven".