190001919 has 32 divisors (see below), whose sum is σ = 285857280. Its totient is φ = 111652992.

The previous prime is 190001909. The next prime is 190001953. The reversal of 190001919 is 919100091.

It is not a de Polignac number, because 190001919 - 2⁵ = 190001887 is a prime.

It is a super-2 number, since 2×190001919² = 72201458447365122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190001909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46549 + ... + 50465.

It is an arithmetic number, because the mean of its divisors is an integer number (8933040).

Almost surely, 2^190001919 is an apocalyptic number.

190001919 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

190001919 is a deficient number, since it is larger than the sum of its proper divisors (95855361).

190001919 is a wasteful number, since it uses less digits than its factorization.

190001919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 190001919 is about 13784.1183613607. The cubic root of 190001919 is about 574.8916433500.

The spelling of 190001919 in words is "one hundred ninety million, one thousand, nine hundred nineteen".