23109857 has 2 divisors, whose sum is σ = 23109858. Its totient is φ = 23109856.

The previous prime is 23109847. The next prime is 23109883. The reversal of 23109857 is 75890132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23001616 + 108241 = 4796^2 + 329^2 .

It is a cyclic number.

It is not a de Polignac number, because 23109857 - 2²² = 18915553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23109847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11554928 + 11554929.

It is an arithmetic number, because the mean of its divisors is an integer number (11554929).

Almost surely, 2^23109857 is an apocalyptic number.

It is an amenable number.

23109857 is a deficient number, since it is larger than the sum of its proper divisors (1).

23109857 is an equidigital number, since it uses as much as digits as its factorization.

23109857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 23109857 is about 4807.2712634092. The cubic root of 23109857 is about 284.8387597231.

Adding to 23109857 its reverse (75890132), we get a palindrome (98999989).

It can be divided in two parts, 2310 and 9857, that added together give a cube (12167 = 23³).

The spelling of 23109857 in words is "twenty-three million, one hundred nine thousand, eight hundred fifty-seven".