187149241 has 2 divisors, whose sum is σ = 187149242. Its totient is φ = 187149240.

The previous prime is 187149227. The next prime is 187149257. The reversal of 187149241 is 142941781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142205625 + 44943616 = 11925^2 + 6704^2 .

It is a cyclic number.

It is not a de Polignac number, because 187149241 - 2¹⁵ = 187116473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 187149241.

It is not a weakly prime, because it can be changed into another prime (187149211) 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, 93574620 + 93574621.

It is an arithmetic number, because the mean of its divisors is an integer number (93574621).

Almost surely, 2^187149241 is an apocalyptic number.

It is an amenable number.

187149241 is a deficient number, since it is larger than the sum of its proper divisors (1).

187149241 is an equidigital number, since it uses as much as digits as its factorization.

187149241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 37.

The square root of 187149241 is about 13680.2500342647. The cubic root of 187149241 is about 571.9999928684. Note that the first 5 decimals are identical.

The spelling of 187149241 in words is "one hundred eighty-seven million, one hundred forty-nine thousand, two hundred forty-one".