117385897 has 2 divisors, whose sum is σ = 117385898. Its totient is φ = 117385896.

The previous prime is 117385889. The next prime is 117385903. The reversal of 117385897 is 798583711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106069401 + 11316496 = 10299^2 + 3364^2 .

It is a cyclic number.

It is not a de Polignac number, because 117385897 - 2³ = 117385889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117385897.

It is not a weakly prime, because it can be changed into another prime (157385897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58692948 + 58692949.

It is an arithmetic number, because the mean of its divisors is an integer number (58692949).

Almost surely, 2^117385897 is an apocalyptic number.

It is an amenable number.

117385897 is a deficient number, since it is larger than the sum of its proper divisors (1).

117385897 is an equidigital number, since it uses as much as digits as its factorization.

117385897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 49.

The square root of 117385897 is about 10834.4772370429. The cubic root of 117385897 is about 489.6344587350.

The spelling of 117385897 in words is "one hundred seventeen million, three hundred eighty-five thousand, eight hundred ninety-seven".