187097117 has 2 divisors, whose sum is σ = 187097118. Its totient is φ = 187097116.

The previous prime is 187097093. The next prime is 187097129. The reversal of 187097117 is 711790781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186759556 + 337561 = 13666^2 + 581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187097117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187097167) 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, 93548558 + 93548559.

It is an arithmetic number, because the mean of its divisors is an integer number (93548559).

Almost surely, 2^187097117 is an apocalyptic number.

It is an amenable number.

187097117 is a deficient number, since it is larger than the sum of its proper divisors (1).

187097117 is an equidigital number, since it uses as much as digits as its factorization.

187097117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 41.

The square root of 187097117 is about 13678.3448194582. The cubic root of 187097117 is about 571.9468842800.

The spelling of 187097117 in words is "one hundred eighty-seven million, ninety-seven thousand, one hundred seventeen".