117807691 has 2 divisors, whose sum is σ = 117807692. Its totient is φ = 117807690.

The previous prime is 117807689. The next prime is 117807707. The reversal of 117807691 is 196708711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117807691 - 2¹ = 117807689 is a prime.

Together with 117807689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (117807631) 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 as a sum of consecutive naturals, namely, 58903845 + 58903846.

It is an arithmetic number, because the mean of its divisors is an integer number (58903846).

Almost surely, 2^117807691 is an apocalyptic number.

117807691 is a deficient number, since it is larger than the sum of its proper divisors (1).

117807691 is an equidigital number, since it uses as much as digits as its factorization.

117807691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 40.

The square root of 117807691 is about 10853.9251425464. The cubic root of 117807691 is about 490.2202133878.

The spelling of 117807691 in words is "one hundred seventeen million, eight hundred seven thousand, six hundred ninety-one".