191928202001 has 4 divisors (see below), whose sum is σ = 191929216752. Its totient is φ = 191927187252.

The previous prime is 191928201967. The next prime is 191928202087. The reversal of 191928202001 is 100202829191.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 191928202001 - 2¹⁸ = 191927939857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191928702001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130211 + ... + 633096.

It is an arithmetic number, because the mean of its divisors is an integer number (47982304188).

Almost surely, 2^191928202001 is an apocalyptic number.

It is an amenable number.

191928202001 is a deficient number, since it is larger than the sum of its proper divisors (1014751).

191928202001 is an equidigital number, since it uses as much as digits as its factorization.

191928202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014750.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 191928202001 in words is "one hundred ninety-one billion, nine hundred twenty-eight million, two hundred two thousand, one".