117156257 has 2 divisors, whose sum is σ = 117156258. Its totient is φ = 117156256.

The previous prime is 117156251. The next prime is 117156323. The reversal of 117156257 is 752651711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96216481 + 20939776 = 9809^2 + 4576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117156257 is a prime.

It is not a weakly prime, because it can be changed into another prime (117156251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58578128 + 58578129.

It is an arithmetic number, because the mean of its divisors is an integer number (58578129).

Almost surely, 2^117156257 is an apocalyptic number.

It is an amenable number.

117156257 is a deficient number, since it is larger than the sum of its proper divisors (1).

117156257 is an equidigital number, since it uses as much as digits as its factorization.

117156257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 35.

The square root of 117156257 is about 10823.8743987539. The cubic root of 117156257 is about 489.3149624951.

The spelling of 117156257 in words is "one hundred seventeen million, one hundred fifty-six thousand, two hundred fifty-seven".