190001939 has 4 divisors (see below), whose sum is σ = 196553760. Its totient is φ = 183450120.

The previous prime is 190001909. The next prime is 190001953. The reversal of 190001939 is 939100091.

190001939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 190001939 - 2¹⁶ = 189936403 is a prime.

It is a super-4 number, since 4×190001939⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 3275867 + ... + 3275924.

It is an arithmetic number, because the mean of its divisors is an integer number (49138440).

Almost surely, 2^190001939 is an apocalyptic number.

190001939 is a deficient number, since it is larger than the sum of its proper divisors (6551821).

190001939 is an equidigital number, since it uses as much as digits as its factorization.

190001939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6551820.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 190001939 is about 13784.1190868332. The cubic root of 190001939 is about 574.8916635214.

The spelling of 190001939 in words is "one hundred ninety million, one thousand, nine hundred thirty-nine".