191749342 has 8 divisors (see below), whose sum is σ = 288648432. Its totient is φ = 95533200.

The previous prime is 191749301. The next prime is 191749379. The reversal of 191749342 is 243947191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 191749295 and 191749304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170034 + ... + 171157.

It is an arithmetic number, because the mean of its divisors is an integer number (36081054).

Almost surely, 2^191749342 is an apocalyptic number.

191749342 is a deficient number, since it is larger than the sum of its proper divisors (96899090).

191749342 is a wasteful number, since it uses less digits than its factorization.

191749342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341474.

The product of its digits is 54432, while the sum is 40.

The square root of 191749342 is about 13847.3586651029. The cubic root of 191749342 is about 576.6486692160.

The spelling of 191749342 in words is "one hundred ninety-one million, seven hundred forty-nine thousand, three hundred forty-two".