190681717 has 2 divisors, whose sum is σ = 190681718. Its totient is φ = 190681716.

The previous prime is 190681697. The next prime is 190681759. The reversal of 190681717 is 717186091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185340996 + 5340721 = 13614^2 + 2311^2 .

It is a cyclic number.

It is not a de Polignac number, because 190681717 - 2¹⁵ = 190648949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 190681717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190681787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95340858 + 95340859.

It is an arithmetic number, because the mean of its divisors is an integer number (95340859).

Almost surely, 2^190681717 is an apocalyptic number.

It is an amenable number.

190681717 is a deficient number, since it is larger than the sum of its proper divisors (1).

190681717 is an equidigital number, since it uses as much as digits as its factorization.

190681717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 40.

The square root of 190681717 is about 13808.7550850900. The cubic root of 190681717 is about 575.5764522704.

The spelling of 190681717 in words is "one hundred ninety million, six hundred eighty-one thousand, seven hundred seventeen".