117251657 has 2 divisors, whose sum is σ = 117251658. Its totient is φ = 117251656.

The previous prime is 117251633. The next prime is 117251663. The reversal of 117251657 is 756152711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108076816 + 9174841 = 10396^2 + 3029^2 .

It is an emirp because it is prime and its reverse (756152711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117251657 - 2²⁰ = 116203081 is a prime.

It is not a weakly prime, because it can be changed into another prime (117253657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58625828 + 58625829.

It is an arithmetic number, because the mean of its divisors is an integer number (58625829).

Almost surely, 2^117251657 is an apocalyptic number.

It is an amenable number.

117251657 is a deficient number, since it is larger than the sum of its proper divisors (1).

117251657 is an equidigital number, since it uses as much as digits as its factorization.

117251657 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 117251657 is about 10828.2804267344. The cubic root of 117251657 is about 489.4477423787.

The spelling of 117251657 in words is "one hundred seventeen million, two hundred fifty-one thousand, six hundred fifty-seven".