23123857 has 4 divisors (see below), whose sum is σ = 23136256. Its totient is φ = 23111460.

The previous prime is 23123843. The next prime is 23123879. The reversal of 23123857 is 75832132.

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 23123857 - 2⁷ = 23123729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23123827) 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, 2769 + ... + 7342.

It is an arithmetic number, because the mean of its divisors is an integer number (5784064).

Almost surely, 2^23123857 is an apocalyptic number.

It is an amenable number.

23123857 is a deficient number, since it is larger than the sum of its proper divisors (12399).

23123857 is a wasteful number, since it uses less digits than its factorization.

23123857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12398.

The product of its digits is 10080, while the sum is 31.

The square root of 23123857 is about 4808.7271704683. The cubic root of 23123857 is about 284.8962667521.

Adding to 23123857 its reverse (75832132), we get a palindrome (98955989).

The spelling of 23123857 in words is "twenty-three million, one hundred twenty-three thousand, eight hundred fifty-seven".