187041649 has 4 divisors (see below), whose sum is σ = 187071040. Its totient is φ = 187012260.

The previous prime is 187041641. The next prime is 187041683. The reversal of 187041649 is 946140781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 187041649 - 2³ = 187041641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (187041641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717 + ... + 19354.

It is an arithmetic number, because the mean of its divisors is an integer number (46767760).

Almost surely, 2^187041649 is an apocalyptic number.

It is an amenable number.

187041649 is a deficient number, since it is larger than the sum of its proper divisors (29391).

187041649 is an equidigital number, since it uses as much as digits as its factorization.

187041649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29390.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 187041649 is about 13676.3170846540. The cubic root of 187041649 is about 571.8903576912.

The spelling of 187041649 in words is "one hundred eighty-seven million, forty-one thousand, six hundred forty-nine".