187887149 has 2 divisors, whose sum is σ = 187887150. Its totient is φ = 187887148.

The previous prime is 187887121. The next prime is 187887163. The reversal of 187887149 is 941788781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148108900 + 39778249 = 12170^2 + 6307^2 .

It is a cyclic number.

It is not a de Polignac number, because 187887149 - 2¹² = 187883053 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 187887149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187887449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93943574 + 93943575.

It is an arithmetic number, because the mean of its divisors is an integer number (93943575).

Almost surely, 2^187887149 is an apocalyptic number.

It is an amenable number.

187887149 is a deficient number, since it is larger than the sum of its proper divisors (1).

187887149 is an equidigital number, since it uses as much as digits as its factorization.

187887149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 53.

The square root of 187887149 is about 13707.1933305108. The cubic root of 187887149 is about 572.7507837673.

The spelling of 187887149 in words is "one hundred eighty-seven million, eight hundred eighty-seven thousand, one hundred forty-nine".