190999799 has 8 divisors (see below), whose sum is σ = 201701040. Its totient is φ = 180363456.

The previous prime is 190999789. The next prime is 190999817. The reversal of 190999799 is 997999091.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190999799 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 (190999729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10112 + ... + 22005.

It is an arithmetic number, because the mean of its divisors is an integer number (25212630).

Almost surely, 2^190999799 is an apocalyptic number.

190999799 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

190999799 is a deficient number, since it is larger than the sum of its proper divisors (10701241).

190999799 is a wasteful number, since it uses less digits than its factorization.

190999799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32449.

The product of its (nonzero) digits is 3720087, while the sum is 62.

The square root of 190999799 is about 13820.2676891586. The cubic root of 190999799 is about 575.8963200331.

The spelling of 190999799 in words is "one hundred ninety million, nine hundred ninety-nine thousand, seven hundred ninety-nine".