187966013 has 4 divisors (see below), whose sum is σ = 188228160. Its totient is φ = 187703868.

The previous prime is 187966003. The next prime is 187966027. The reversal of 187966013 is 310669781.

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, and also an emirpimes, since its reverse is a distinct semiprime: 310669781 = 17 ⋅18274693.

It is a cyclic number.

It is not a de Polignac number, because 187966013 - 2⁴ = 187965997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187966003) 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, 129995 + ... + 131432.

It is an arithmetic number, because the mean of its divisors is an integer number (47057040).

Almost surely, 2^187966013 is an apocalyptic number.

It is an amenable number.

187966013 is a deficient number, since it is larger than the sum of its proper divisors (262147).

187966013 is an equidigital number, since it uses as much as digits as its factorization.

187966013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262146.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 187966013 is about 13710.0697664162. The cubic root of 187966013 is about 572.8309082812.

The spelling of 187966013 in words is "one hundred eighty-seven million, nine hundred sixty-six thousand, thirteen".