191311001323 has 4 divisors (see below), whose sum is σ = 206027232208. Its totient is φ = 176594770440.

The previous prime is 191311001317. The next prime is 191311001351. The reversal of 191311001323 is 323100113191.

191311001323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 191311001323 - 2³⁷ = 53872047851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191311001363) by changing a digit.

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, 7358115423 + ... + 7358115448.

It is an arithmetic number, because the mean of its divisors is an integer number (51506808052).

Almost surely, 2^191311001323 is an apocalyptic number.

191311001323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

191311001323 is a deficient number, since it is larger than the sum of its proper divisors (14716230885).

191311001323 is a wasteful number, since it uses less digits than its factorization.

191311001323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14716230884.

The product of its (nonzero) digits is 486, while the sum is 25.

The spelling of 191311001323 in words is "one hundred ninety-one billion, three hundred eleven million, one thousand, three hundred twenty-three".