191000190 has 32 divisors (see below), whose sum is σ = 458765856. Its totient is φ = 50892800.

The previous prime is 191000189. The next prime is 191000203. The reversal of 191000190 is 91000191.

It is a super-2 number, since 2×191000190² = 72962145160072200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 66790 + ... + 69590.

It is an arithmetic number, because the mean of its divisors is an integer number (14336433).

Almost surely, 2^191000190 is an apocalyptic number.

191000190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191000190 is an abundant number, since it is smaller than the sum of its proper divisors (267765666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191000190 is a wasteful number, since it uses less digits than its factorization.

191000190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 191000190 is about 13820.2818350423. The cubic root of 191000190 is about 575.8967130096.

Subtracting from 191000190 its reverse (91000191), we obtain a palindrome (99999999).

The spelling of 191000190 in words is "one hundred ninety-one million, one hundred ninety", and thus it is an aban number.