233997857 has 2 divisors, whose sum is σ = 233997858. Its totient is φ = 233997856.

The previous prime is 233997847. The next prime is 233997859. The reversal of 233997857 is 758799332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118026496 + 115971361 = 10864^2 + 10769^2 .

It is a cyclic number.

It is not a de Polignac number, because 233997857 - 2⁸ = 233997601 is a prime.

Together with 233997859, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 233997799 and 233997808.

It is not a weakly prime, because it can be changed into another prime (233997859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116998928 + 116998929.

It is an arithmetic number, because the mean of its divisors is an integer number (116998929).

Almost surely, 2^233997857 is an apocalyptic number.

It is an amenable number.

233997857 is a deficient number, since it is larger than the sum of its proper divisors (1).

233997857 is an equidigital number, since it uses as much as digits as its factorization.

233997857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 53.

The square root of 233997857 is about 15296.9884944717. The cubic root of 233997857 is about 616.2221336181. Note that the first 3 decimals are identical.

The spelling of 233997857 in words is "two hundred thirty-three million, nine hundred ninety-seven thousand, eight hundred fifty-seven".