830119021 has 4 divisors (see below), whose sum is σ = 831935932. Its totient is φ = 828302112.

The previous prime is 830119009. The next prime is 830119051. The reversal of 830119021 is 120911038.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 541492900 + 288626121 = 23270^2 + 16989^2 .

It is a cyclic number.

It is not a de Polignac number, because 830119021 - 2⁷ = 830118893 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 (830119051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 907770 + ... + 908683.

It is an arithmetic number, because the mean of its divisors is an integer number (207983983).

Almost surely, 2^830119021 is an apocalyptic number.

It is an amenable number.

830119021 is a deficient number, since it is larger than the sum of its proper divisors (1816911).

830119021 is a wasteful number, since it uses less digits than its factorization.

830119021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816910.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 830119021 is about 28811.7861473391. The cubic root of 830119021 is about 939.8245564375.

The spelling of 830119021 in words is "eight hundred thirty million, one hundred nineteen thousand, twenty-one".