117678517 has 4 divisors (see below), whose sum is σ = 128376576. Its totient is φ = 106980460.

The previous prime is 117678503. The next prime is 117678521. The reversal of 117678517 is 715876711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 117678517 - 2²³ = 109289909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117678527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5349013 + ... + 5349034.

It is an arithmetic number, because the mean of its divisors is an integer number (32094144).

Almost surely, 2^117678517 is an apocalyptic number.

It is an amenable number.

117678517 is a deficient number, since it is larger than the sum of its proper divisors (10698059).

117678517 is a wasteful number, since it uses less digits than its factorization.

117678517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10698058.

The product of its digits is 82320, while the sum is 43.

The square root of 117678517 is about 10847.9729442878. The cubic root of 117678517 is about 490.0409753323.

The spelling of 117678517 in words is "one hundred seventeen million, six hundred seventy-eight thousand, five hundred seventeen".