230291857 has 2 divisors, whose sum is σ = 230291858. Its totient is φ = 230291856.

The previous prime is 230291849. The next prime is 230291863. The reversal of 230291857 is 758192032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180391761 + 49900096 = 13431^2 + 7064^2 .

It is a cyclic number.

It is not a de Polignac number, because 230291857 - 2³ = 230291849 is a prime.

It is equal to p_12657718 and since 230291857 and 12657718 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (230291807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115145928 + 115145929.

It is an arithmetic number, because the mean of its divisors is an integer number (115145929).

Almost surely, 2^230291857 is an apocalyptic number.

It is an amenable number.

230291857 is a deficient number, since it is larger than the sum of its proper divisors (1).

230291857 is an equidigital number, since it uses as much as digits as its factorization.

230291857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 230291857 is about 15175.3700778597. The cubic root of 230291857 is about 612.9516153939.

The spelling of 230291857 in words is "two hundred thirty million, two hundred ninety-one thousand, eight hundred fifty-seven".