23091857 has 2 divisors, whose sum is σ = 23091858. Its totient is φ = 23091856.

The previous prime is 23091791. The next prime is 23091877. The reversal of 23091857 is 75819032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21613201 + 1478656 = 4649^2 + 1216^2 .

It is a cyclic number.

It is not a de Polignac number, because 23091857 - 2¹⁴ = 23075473 is a prime.

It is not a weakly prime, because it can be changed into another prime (23091877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11545928 + 11545929.

It is an arithmetic number, because the mean of its divisors is an integer number (11545929).

Almost surely, 2^23091857 is an apocalyptic number.

It is an amenable number.

23091857 is a deficient number, since it is larger than the sum of its proper divisors (1).

23091857 is an equidigital number, since it uses as much as digits as its factorization.

23091857 is an evil number, because the sum of its binary digits is even.

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

The square root of 23091857 is about 4805.3987347566. The cubic root of 23091857 is about 284.7647879774.

The spelling of 23091857 in words is "twenty-three million, ninety-one thousand, eight hundred fifty-seven".