118170257 has 2 divisors, whose sum is σ = 118170258. Its totient is φ = 118170256.

The previous prime is 118170223. The next prime is 118170259. The reversal of 118170257 is 752071811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114725521 + 3444736 = 10711^2 + 1856^2 .

It is a cyclic number.

It is not a de Polignac number, because 118170257 - 2⁸ = 118170001 is a prime.

Together with 118170259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (118170259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59085128 + 59085129.

It is an arithmetic number, because the mean of its divisors is an integer number (59085129).

Almost surely, 2^118170257 is an apocalyptic number.

It is an amenable number.

118170257 is a deficient number, since it is larger than the sum of its proper divisors (1).

118170257 is an equidigital number, since it uses as much as digits as its factorization.

118170257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 32.

The square root of 118170257 is about 10870.6143800615. The cubic root of 118170257 is about 490.7226003891.

The spelling of 118170257 in words is "one hundred eighteen million, one hundred seventy thousand, two hundred fifty-seven".