117925187 has 2 divisors, whose sum is σ = 117925188. Its totient is φ = 117925186.

The previous prime is 117925109. The next prime is 117925189. The reversal of 117925187 is 781529711.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117925187 is a prime.

Together with 117925189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117925189) 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, 58962593 + 58962594.

It is an arithmetic number, because the mean of its divisors is an integer number (58962594).

Almost surely, 2^117925187 is an apocalyptic number.

117925187 is a deficient number, since it is larger than the sum of its proper divisors (1).

117925187 is an equidigital number, since it uses as much as digits as its factorization.

117925187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 41.

The square root of 117925187 is about 10859.3363977731. The cubic root of 117925187 is about 490.3831336393.

The spelling of 117925187 in words is "one hundred seventeen million, nine hundred twenty-five thousand, one hundred eighty-seven".