77834 has 4 divisors (see below), whose sum is σ = 116754. Its totient is φ = 38916.

The previous prime is 77813. The next prime is 77839. The reversal of 77834 is 43877.

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

It can be written as a sum of positive squares in only one way, i.e., 75625 + 2209 = 275^2 + 47^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77797 and 77806.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 77834.

It is not an unprimeable number, because it can be changed into a prime (77839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19457 + ... + 19460.

2⁷⁷⁸³⁴ is an apocalyptic number.

77834 is a deficient number, since it is larger than the sum of its proper divisors (38920).

77834 is a wasteful number, since it uses less digits than its factorization.

77834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38919.

The product of its digits is 4704, while the sum is 29.

The square root of 77834 is about 278.9874549151. The cubic root of 77834 is about 42.6962549756.

The spelling of 77834 in words is "seventy-seven thousand, eight hundred thirty-four".