678542829 has 8 divisors (see below), whose sum is σ = 904844640. Its totient is φ = 452301456.

The previous prime is 678542819. The next prime is 678542831. The reversal of 678542829 is 928245876.

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

It is not a de Polignac number, because 678542829 - 2⁵ = 678542797 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678542819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32734 + ... + 49280.

It is an arithmetic number, because the mean of its divisors is an integer number (113105580).

Almost surely, 2^678542829 is an apocalyptic number.

It is an amenable number.

678542829 is a deficient number, since it is larger than the sum of its proper divisors (226301811).

678542829 is a wasteful number, since it uses less digits than its factorization.

678542829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30219.

The product of its digits is 1935360, while the sum is 51.

The square root of 678542829 is about 26048.8546581227. The cubic root of 678542829 is about 878.7373545674.

The spelling of 678542829 in words is "six hundred seventy-eight million, five hundred forty-two thousand, eight hundred twenty-nine".