117858557 has 2 divisors, whose sum is σ = 117858558. Its totient is φ = 117858556.

The previous prime is 117858551. The next prime is 117858593. The reversal of 117858557 is 755858711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64947481 + 52911076 = 8059^2 + 7274^2 .

It is an emirp because it is prime and its reverse (755858711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117858557 - 2⁴ = 117858541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117858551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58929278 + 58929279.

It is an arithmetic number, because the mean of its divisors is an integer number (58929279).

Almost surely, 2^117858557 is an apocalyptic number.

It is an amenable number.

117858557 is a deficient number, since it is larger than the sum of its proper divisors (1).

117858557 is an equidigital number, since it uses as much as digits as its factorization.

117858557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 392000, while the sum is 47.

The square root of 117858557 is about 10856.2680972791. The cubic root of 117858557 is about 490.2907576033.

The spelling of 117858557 in words is "one hundred seventeen million, eight hundred fifty-eight thousand, five hundred fifty-seven".