186994051 has 2 divisors, whose sum is σ = 186994052. Its totient is φ = 186994050.

The previous prime is 186994019. The next prime is 186994063. The reversal of 186994051 is 150499681.

It is a strong prime.

It is an emirp because it is prime and its reverse (150499681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 186994051 - 2⁵ = 186994019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 186993989 and 186994007.

It is not a weakly prime, because it can be changed into another prime (186994351) 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 as a sum of consecutive naturals, namely, 93497025 + 93497026.

It is an arithmetic number, because the mean of its divisors is an integer number (93497026).

Almost surely, 2^186994051 is an apocalyptic number.

186994051 is a deficient number, since it is larger than the sum of its proper divisors (1).

186994051 is an equidigital number, since it uses as much as digits as its factorization.

186994051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 186994051 is about 13674.5768124648. The cubic root of 186994051 is about 571.8418423886.

The spelling of 186994051 in words is "one hundred eighty-six million, nine hundred ninety-four thousand, fifty-one".