190588661 has 2 divisors, whose sum is σ = 190588662. Its totient is φ = 190588660.

The previous prime is 190588633. The next prime is 190588681. The reversal of 190588661 is 166885091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162435025 + 28153636 = 12745^2 + 5306^2 .

It is an emirp because it is prime and its reverse (166885091) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190588661 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (190588681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95294330 + 95294331.

It is an arithmetic number, because the mean of its divisors is an integer number (95294331).

Almost surely, 2^190588661 is an apocalyptic number.

It is an amenable number.

190588661 is a deficient number, since it is larger than the sum of its proper divisors (1).

190588661 is an equidigital number, since it uses as much as digits as its factorization.

190588661 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 190588661 is about 13805.3852173708. The cubic root of 190588661 is about 575.4828065897.

The spelling of 190588661 in words is "one hundred ninety million, five hundred eighty-eight thousand, six hundred sixty-one".