830188561 has 4 divisors (see below), whose sum is σ = 831268900. Its totient is φ = 829108224.

The previous prime is 830188547. The next prime is 830188571. The reversal of 830188561 is 165881038.

830188561 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 an emirpimes, since its reverse is a distinct semiprime: 165881038 = 2 ⋅82940519.

It can be written as a sum of positive squares in 2 ways, for example, as 145057936 + 685130625 = 12044^2 + 26175^2 .

It is a cyclic number.

It is not a de Polignac number, because 830188561 - 2¹³ = 830180369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (830188501) 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, 539016 + ... + 540553.

It is an arithmetic number, because the mean of its divisors is an integer number (207817225).

Almost surely, 2^830188561 is an apocalyptic number.

It is an amenable number.

830188561 is a deficient number, since it is larger than the sum of its proper divisors (1080339).

830188561 is a wasteful number, since it uses less digits than its factorization.

830188561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080338.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 830188561 is about 28812.9929198617. The cubic root of 830188561 is about 939.8507990899.

The spelling of 830188561 in words is "eight hundred thirty million, one hundred eighty-eight thousand, five hundred sixty-one".