834779819 has 4 divisors (see below), whose sum is σ = 863565360. Its totient is φ = 805994280.

The previous prime is 834779797. The next prime is 834779837. The reversal of 834779819 is 918977438.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918977438 = 2 ⋅459488719.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-834779819 is a prime.

It is a super-2 number, since 2×834779819² = 1393714692419345522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (834779419) 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, 14392727 + ... + 14392784.

It is an arithmetic number, because the mean of its divisors is an integer number (215891340).

Almost surely, 2^834779819 is an apocalyptic number.

834779819 is a deficient number, since it is larger than the sum of its proper divisors (28785541).

834779819 is a wasteful number, since it uses less digits than its factorization.

834779819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28785540.

The product of its digits is 3048192, while the sum is 56.

The square root of 834779819 is about 28892.5564635600. The cubic root of 834779819 is about 941.5801922036.

The spelling of 834779819 in words is "eight hundred thirty-four million, seven hundred seventy-nine thousand, eight hundred nineteen".