191928457273 has 4 divisors (see below), whose sum is σ = 219346808320. Its totient is φ = 164510106228.

The previous prime is 191928457249. The next prime is 191928457289. The reversal of 191928457273 is 372754829191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 191928457273 - 2²⁵ = 191894902841 is a prime.

It is a super-2 number, since 2×191928457273² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191928457223) 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, 13709175513 + ... + 13709175526.

It is an arithmetic number, because the mean of its divisors is an integer number (54836702080).

Almost surely, 2^191928457273 is an apocalyptic number.

It is an amenable number.

191928457273 is a deficient number, since it is larger than the sum of its proper divisors (27418351047).

191928457273 is an equidigital number, since it uses as much as digits as its factorization.

191928457273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27418351046.

The product of its digits is 7620480, while the sum is 58.

The spelling of 191928457273 in words is "one hundred ninety-one billion, nine hundred twenty-eight million, four hundred fifty-seven thousand, two hundred seventy-three".