190199917 has 4 divisors (see below), whose sum is σ = 190281600. Its totient is φ = 190118236.

The previous prime is 190199909. The next prime is 190199923. The reversal of 190199917 is 719991091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 719991091 = 29 ⋅24827279.

It is a cyclic number.

It is not a de Polignac number, because 190199917 - 2³ = 190199909 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 (190199017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37243 + ... + 42040.

It is an arithmetic number, because the mean of its divisors is an integer number (47570400).

Almost surely, 2^190199917 is an apocalyptic number.

It is an amenable number.

190199917 is a deficient number, since it is larger than the sum of its proper divisors (81683).

190199917 is an equidigital number, since it uses as much as digits as its factorization.

190199917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81682.

The product of its (nonzero) digits is 45927, while the sum is 46.

The square root of 190199917 is about 13791.2985973040. The cubic root of 190199917 is about 575.0912691921.

The spelling of 190199917 in words is "one hundred ninety million, one hundred ninety-nine thousand, nine hundred seventeen".