191949004343 has 4 divisors (see below), whose sum is σ = 196033025760. Its totient is φ = 187864982928.

The previous prime is 191949004333. The next prime is 191949004361. The reversal of 191949004343 is 343400949191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343400949191 = 613 ⋅560197307.

It is a cyclic number.

It is not a de Polignac number, because 191949004343 - 2⁴ = 191949004327 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 4084021369 = 191949004343 / (1 + 9 + 1 + 9 + 4 + 9 + 0 + 0 + 4 + 3 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191949004333) 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, 2042010638 + ... + 2042010731.

It is an arithmetic number, because the mean of its divisors is an integer number (49008256440).

Almost surely, 2^191949004343 is an apocalyptic number.

191949004343 is a deficient number, since it is larger than the sum of its proper divisors (4084021417).

191949004343 is an equidigital number, since it uses as much as digits as its factorization.

191949004343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4084021416.

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 191949004343 in words is "one hundred ninety-one billion, nine hundred forty-nine million, four thousand, three hundred forty-three".