187104881 has 2 divisors, whose sum is σ = 187104882. Its totient is φ = 187104880.

The previous prime is 187104877. The next prime is 187104889. The reversal of 187104881 is 188401781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157728481 + 29376400 = 12559^2 + 5420^2 .

It is an emirp because it is prime and its reverse (188401781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 187104881 - 2² = 187104877 is a prime.

It is a super-2 number, since 2×187104881² = 70016472988048322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (187104889) 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, 93552440 + 93552441.

It is an arithmetic number, because the mean of its divisors is an integer number (93552441).

Almost surely, 2^187104881 is an apocalyptic number.

It is an amenable number.

187104881 is a deficient number, since it is larger than the sum of its proper divisors (1).

187104881 is an equidigital number, since it uses as much as digits as its factorization.

187104881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 38.

The square root of 187104881 is about 13678.6286227823. The cubic root of 187104881 is about 571.9547955621.

The spelling of 187104881 in words is "one hundred eighty-seven million, one hundred four thousand, eight hundred eighty-one".