834989391 has 20 divisors (see below), whose sum is σ = 1320704352. Its totient is φ = 523914048.

The previous prime is 834989383. The next prime is 834989429. The reversal of 834989391 is 193989438.

It is not a de Polignac number, because 834989391 - 2³ = 834989383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (834989341) 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 19 ways as a sum of consecutive naturals, for example, 301815 + ... + 304568.

Almost surely, 2^834989391 is an apocalyptic number.

834989391 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

834989391 is a deficient number, since it is larger than the sum of its proper divisors (485714961).

834989391 is a wasteful number, since it uses less digits than its factorization.

834989391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606412 (or 606403 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 834989391 is about 28896.1829832246. The cubic root of 834989391 is about 941.6589803777.

The spelling of 834989391 in words is "eight hundred thirty-four million, nine hundred eighty-nine thousand, three hundred ninety-one".