834738643 has 4 divisors (see below), whose sum is σ = 861665728. Its totient is φ = 807811560.

The previous prime is 834738629. The next prime is 834738649. The reversal of 834738643 is 346837438.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-834738643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 834738593 and 834738602.

It is not an unprimeable number, because it can be changed into a prime (834738649) 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, 13463496 + ... + 13463557.

It is an arithmetic number, because the mean of its divisors is an integer number (215416432).

Almost surely, 2^834738643 is an apocalyptic number.

834738643 is a deficient number, since it is larger than the sum of its proper divisors (26927085).

834738643 is a wasteful number, since it uses less digits than its factorization.

834738643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26927084.

The product of its digits is 1161216, while the sum is 46.

The square root of 834738643 is about 28891.8438836984. The cubic root of 834738643 is about 941.5647106189.

The spelling of 834738643 in words is "eight hundred thirty-four million, seven hundred thirty-eight thousand, six hundred forty-three".