834991789 has 8 divisors (see below), whose sum is σ = 866308608. Its totient is φ = 803948880.

The previous prime is 834991757. The next prime is 834991823. The reversal of 834991789 is 987199438.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 834991789 - 2⁵ = 834991757 is a prime.

It is a super-2 number, since 2×834991789² = 1394422575394841042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (834991709) 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 7 ways as a sum of consecutive naturals, for example, 62257 + ... + 74470.

It is an arithmetic number, because the mean of its divisors is an integer number (108288576).

Almost surely, 2^834991789 is an apocalyptic number.

It is an amenable number.

834991789 is a deficient number, since it is larger than the sum of its proper divisors (31316819).

834991789 is a wasteful number, since it uses less digits than its factorization.

834991789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136955.

The product of its digits is 3919104, while the sum is 58.

The square root of 834991789 is about 28896.2244765644. The cubic root of 834991789 is about 941.6598818247.

The spelling of 834991789 in words is "eight hundred thirty-four million, nine hundred ninety-one thousand, seven hundred eighty-nine".