190928372821 has 8 divisors (see below), whose sum is σ = 196020783000. Its totient is φ = 185856706560.

The previous prime is 190928372807. The next prime is 190928372867. The reversal of 190928372821 is 128273829091.

It is a happy number.

190928372821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1577201796 + 189351171025 = 39714^2 + 435145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190928372821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190928372891) 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 7 ways as a sum of consecutive naturals, for example, 5167326 + ... + 5204143.

It is an arithmetic number, because the mean of its divisors is an integer number (24502597875).

Almost surely, 2^190928372821 is an apocalyptic number.

It is an amenable number.

190928372821 is a deficient number, since it is larger than the sum of its proper divisors (5092410179).

190928372821 is a wasteful number, since it uses less digits than its factorization.

190928372821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10371959.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 190928372821 in words is "one hundred ninety billion, nine hundred twenty-eight million, three hundred seventy-two thousand, eight hundred twenty-one".