191093980 has 48 divisors (see below), whose sum is σ = 500322816. Its totient is φ = 59561280.

The previous prime is 191093953. The next prime is 191094017. The reversal of 191093980 is 89390191.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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, 60504 + ... + 63583.

It is an arithmetic number, because the mean of its divisors is an integer number (10423392).

Almost surely, 2^191093980 is an apocalyptic number.

191093980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191093980 is an abundant number, since it is smaller than the sum of its proper divisors (309228836).

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

191093980 is a wasteful number, since it uses less digits than its factorization.

191093980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124114 (or 124112 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 191093980 is about 13823.6746200133. The cubic root of 191093980 is about 575.9909616316.

The spelling of 191093980 in words is "one hundred ninety-one million, ninety-three thousand, nine hundred eighty".