834739649 has 4 divisors (see below), whose sum is σ = 843004500. Its totient is φ = 826474800.

The previous prime is 834739639. The next prime is 834739657. The reversal of 834739649 is 946937438.

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 511890625 + 322849024 = 22625^2 + 17968^2 .

It is a cyclic number.

It is not a de Polignac number, because 834739649 - 2²⁰ = 833691073 is a prime.

It is a super-2 number, since 2×834739649² = 1393580563225286402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 834739649.

It is not an unprimeable number, because it can be changed into a prime (834739639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4132274 + ... + 4132475.

It is an arithmetic number, because the mean of its divisors is an integer number (210751125).

Almost surely, 2^834739649 is an apocalyptic number.

It is an amenable number.

834739649 is a deficient number, since it is larger than the sum of its proper divisors (8264851).

834739649 is a wasteful number, since it uses less digits than its factorization.

834739649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8264850.

The product of its digits is 3919104, while the sum is 53.

The square root of 834739649 is about 28891.8612934508. The cubic root of 834739649 is about 941.5650888665.

The spelling of 834739649 in words is "eight hundred thirty-four million, seven hundred thirty-nine thousand, six hundred forty-nine".