190479000721 has 3 divisors (see below), whose sum is σ = 190479437161. Its totient is φ = 190478564282.

The previous prime is 190479000713. The next prime is 190479000743. The reversal of 190479000721 is 127000974091.

The square root of 190479000721 is 436439.

It is a perfect power (a square), and thus also a powerful number.

190479000721 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, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 190479000721 - 2³ = 190479000713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190479000791) 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 2 ways as a sum of consecutive naturals, for example, 218220 + ... + 654658.

Almost surely, 2^190479000721 is an apocalyptic number.

190479000721 is the 436439-th square number.

190479000721 is the 218220-th centered octagonal number.

It is an amenable number.

190479000721 is a deficient number, since it is larger than the sum of its proper divisors (436440).

190479000721 is an frugal number, since it uses more digits than its factorization.

190479000721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872878 (or 436439 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 40.

The spelling of 190479000721 in words is "one hundred ninety billion, four hundred seventy-nine million, seven hundred twenty-one", and thus it is an aban number.