191420938 has 16 divisors (see below), whose sum is σ = 298161000. Its totient is φ = 92059072.

The previous prime is 191420903. The next prime is 191420963. The reversal of 191420938 is 839024191.

It can be written as a sum of positive squares in 4 ways, for example, as 166590649 + 24830289 = 12907^2 + 4983^2 .

It is a junction number, because it is equal to n+sod(n) for n = 191420897 and 191420906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9468 + ... + 21736.

Almost surely, 2^191420938 is an apocalyptic number.

191420938 is a deficient number, since it is larger than the sum of its proper divisors (106740062).

191420938 is a wasteful number, since it uses less digits than its factorization.

191420938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12569.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 191420938 is about 13835.4955820166. The cubic root of 191420938 is about 576.3192774828.

The spelling of 191420938 in words is "one hundred ninety-one million, four hundred twenty thousand, nine hundred thirty-eight".