191891314293 has 32 divisors (see below), whose sum is σ = 296502091776. Its totient is φ = 108116995968.

The previous prime is 191891314261. The next prime is 191891314309. The reversal of 191891314293 is 392413198191.

It is not a de Polignac number, because 191891314293 - 2⁵ = 191891314261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191891314393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5512180 + ... + 5546882.

It is an arithmetic number, because the mean of its divisors is an integer number (9265690368).

Almost surely, 2^191891314293 is an apocalyptic number.

It is an amenable number.

191891314293 is a deficient number, since it is larger than the sum of its proper divisors (104610777483).

191891314293 is a wasteful number, since it uses less digits than its factorization.

191891314293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38393.

The product of its digits is 419904, while the sum is 51.

The spelling of 191891314293 in words is "one hundred ninety-one billion, eight hundred ninety-one million, three hundred fourteen thousand, two hundred ninety-three".