190317997 has 4 divisors (see below), whose sum is σ = 190368220. Its totient is φ = 190267776.

The previous prime is 190317971. The next prime is 190318001. The reversal of 190317997 is 799713091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99420841 + 90897156 = 9971^2 + 9534^2 .

It is a cyclic number.

It is not a de Polignac number, because 190317997 - 2²⁷ = 56100269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190317917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18918 + ... + 27175.

It is an arithmetic number, because the mean of its divisors is an integer number (47592055).

Almost surely, 2^190317997 is an apocalyptic number.

It is an amenable number.

190317997 is a deficient number, since it is larger than the sum of its proper divisors (50223).

190317997 is an equidigital number, since it uses as much as digits as its factorization.

190317997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50222.

The product of its (nonzero) digits is 107163, while the sum is 46.

The square root of 190317997 is about 13795.5788932542. The cubic root of 190317997 is about 575.2102540482.

It can be divided in two parts, 19031 and 7997, that added together give a triangular number (27028 = T₂₃₂).

The spelling of 190317997 in words is "one hundred ninety million, three hundred seventeen thousand, nine hundred ninety-seven".