187104857 has 2 divisors, whose sum is σ = 187104858. Its totient is φ = 187104856.

The previous prime is 187104851. The next prime is 187104859. The reversal of 187104857 is 758401781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106894921 + 80209936 = 10339^2 + 8956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187104857 is a prime.

Together with 187104859, 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 (187104851) 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, 93552428 + 93552429.

It is an arithmetic number, because the mean of its divisors is an integer number (93552429).

Almost surely, 2^187104857 is an apocalyptic number.

It is an amenable number.

187104857 is a deficient number, since it is larger than the sum of its proper divisors (1).

187104857 is an equidigital number, since it uses as much as digits as its factorization.

187104857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62720, while the sum is 41.

The square root of 187104857 is about 13678.6277455014. The cubic root of 187104857 is about 571.9547711071.

The spelling of 187104857 in words is "one hundred eighty-seven million, one hundred four thousand, eight hundred fifty-seven".