190586681 has 2 divisors, whose sum is σ = 190586682. Its totient is φ = 190586680.

The previous prime is 190586657. The next prime is 190586687. The reversal of 190586681 is 186685091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104857600 + 85729081 = 10240^2 + 9259^2 .

It is a cyclic number.

It is not a de Polignac number, because 190586681 - 2¹⁴ = 190570297 is a prime.

It is a super-2 number, since 2×190586681² = 72646565949191522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (190586687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95293340 + 95293341.

It is an arithmetic number, because the mean of its divisors is an integer number (95293341).

Almost surely, 2^190586681 is an apocalyptic number.

It is an amenable number.

190586681 is a deficient number, since it is larger than the sum of its proper divisors (1).

190586681 is an equidigital number, since it uses as much as digits as its factorization.

190586681 is an evil number, because the sum of its binary digits is even.

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

The square root of 190586681 is about 13805.3135060382. The cubic root of 190586681 is about 575.4808137116.

The spelling of 190586681 in words is "one hundred ninety million, five hundred eighty-six thousand, six hundred eighty-one".