186950681 has 2 divisors, whose sum is σ = 186950682. Its totient is φ = 186950680.

The previous prime is 186950653. The next prime is 186950707. The reversal of 186950681 is 186059681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130325056 + 56625625 = 11416^2 + 7525^2 .

It is a cyclic number.

It is not a de Polignac number, because 186950681 - 2¹⁰ = 186949657 is a prime.

It is a super-2 number, since 2×186950681² = 69901114252727522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (186953681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93475340 + 93475341.

It is an arithmetic number, because the mean of its divisors is an integer number (93475341).

Almost surely, 2^186950681 is an apocalyptic number.

It is an amenable number.

186950681 is a deficient number, since it is larger than the sum of its proper divisors (1).

186950681 is an equidigital number, since it uses as much as digits as its factorization.

186950681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 186950681 is about 13672.9909310290. The cubic root of 186950681 is about 571.7976293986.

The spelling of 186950681 in words is "one hundred eighty-six million, nine hundred fifty thousand, six hundred eighty-one".