186866741 has 2 divisors, whose sum is σ = 186866742. Its totient is φ = 186866740.

The previous prime is 186866707. The next prime is 186866759. The reversal of 186866741 is 147668681.

186866741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135815716 + 51051025 = 11654^2 + 7145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-186866741 is a prime.

It is a super-2 number, since 2×186866741² = 69838357783922162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (186866041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93433370 + 93433371.

It is an arithmetic number, because the mean of its divisors is an integer number (93433371).

Almost surely, 2^186866741 is an apocalyptic number.

It is an amenable number.

186866741 is a deficient number, since it is larger than the sum of its proper divisors (1).

186866741 is an equidigital number, since it uses as much as digits as its factorization.

186866741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 47.

The square root of 186866741 is about 13669.9210312276. The cubic root of 186866741 is about 571.7120384146.

The spelling of 186866741 in words is "one hundred eighty-six million, eight hundred sixty-six thousand, seven hundred forty-one".