186837649 has 2 divisors, whose sum is σ = 186837650. Its totient is φ = 186837648.

The previous prime is 186837641. The next prime is 186837661. The reversal of 186837649 is 946738681.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125888400 + 60949249 = 11220^2 + 7807^2 .

It is a cyclic number.

It is not a de Polignac number, because 186837649 - 2³ = 186837641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 186837596 and 186837605.

It is not a weakly prime, because it can be changed into another prime (186837641) 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, 93418824 + 93418825.

It is an arithmetic number, because the mean of its divisors is an integer number (93418825).

Almost surely, 2^186837649 is an apocalyptic number.

It is an amenable number.

186837649 is a deficient number, since it is larger than the sum of its proper divisors (1).

186837649 is an equidigital number, since it uses as much as digits as its factorization.

186837649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 52.

The square root of 186837649 is about 13668.8569017310. The cubic root of 186837649 is about 571.6823682341.

The spelling of 186837649 in words is "one hundred eighty-six million, eight hundred thirty-seven thousand, six hundred forty-nine".