678756934 has 8 divisors (see below), whose sum is σ = 1045652688. Its totient is φ = 330206040.

The previous prime is 678756917. The next prime is 678756941. The reversal of 678756934 is 439657876.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4586122 + ... + 4586269.

It is an arithmetic number, because the mean of its divisors is an integer number (130706586).

Almost surely, 2^678756934 is an apocalyptic number.

678756934 is a deficient number, since it is larger than the sum of its proper divisors (366895754).

678756934 is a wasteful number, since it uses less digits than its factorization.

678756934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9172430.

The product of its digits is 7620480, while the sum is 55.

The square root of 678756934 is about 26052.9640156355. The cubic root of 678756934 is about 878.8297694051.

The spelling of 678756934 in words is "six hundred seventy-eight million, seven hundred fifty-six thousand, nine hundred thirty-four".