187289149 has 2 divisors, whose sum is σ = 187289150. Its totient is φ = 187289148.

The previous prime is 187289129. The next prime is 187289173. The reversal of 187289149 is 941982781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183792249 + 3496900 = 13557^2 + 1870^2 .

It is an emirp because it is prime and its reverse (941982781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 187289149 - 2⁷ = 187289021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187289129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93644574 + 93644575.

It is an arithmetic number, because the mean of its divisors is an integer number (93644575).

Almost surely, 2^187289149 is an apocalyptic number.

It is an amenable number.

187289149 is a deficient number, since it is larger than the sum of its proper divisors (1).

187289149 is an equidigital number, since it uses as much as digits as its factorization.

187289149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 49.

The square root of 187289149 is about 13685.3625819706. The cubic root of 187289149 is about 572.1424949000.

The spelling of 187289149 in words is "one hundred eighty-seven million, two hundred eighty-nine thousand, one hundred forty-nine".