117812257 has 2 divisors, whose sum is σ = 117812258. Its totient is φ = 117812256.

The previous prime is 117812249. The next prime is 117812263. The reversal of 117812257 is 752218711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98724096 + 19088161 = 9936^2 + 4369^2 .

It is a cyclic number.

It is not a de Polignac number, because 117812257 - 2³ = 117812249 is a prime.

It is not a weakly prime, because it can be changed into another prime (117812207) 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, 58906128 + 58906129.

It is an arithmetic number, because the mean of its divisors is an integer number (58906129).

Almost surely, 2^117812257 is an apocalyptic number.

It is an amenable number.

117812257 is a deficient number, since it is larger than the sum of its proper divisors (1).

117812257 is an equidigital number, since it uses as much as digits as its factorization.

117812257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7840, while the sum is 34.

The square root of 117812257 is about 10854.1354791618. The cubic root of 117812257 is about 490.2265466375.

The spelling of 117812257 in words is "one hundred seventeen million, eight hundred twelve thousand, two hundred fifty-seven".