678493039 has 4 divisors (see below), whose sum is σ = 775420624. Its totient is φ = 581565456.

The previous prime is 678493009. The next prime is 678493043. The reversal of 678493039 is 930394876.

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

It is a cyclic number.

It is not a de Polignac number, because 678493039 - 2⁵ = 678493007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 678492983 and 678493001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678493009) 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, 48463782 + ... + 48463795.

It is an arithmetic number, because the mean of its divisors is an integer number (193855156).

Almost surely, 2^678493039 is an apocalyptic number.

678493039 is a deficient number, since it is larger than the sum of its proper divisors (96927585).

678493039 is an equidigital number, since it uses as much as digits as its factorization.

678493039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96927584.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 678493039 is about 26047.8989363826. The cubic root of 678493039 is about 878.7158607618.

The spelling of 678493039 in words is "six hundred seventy-eight million, four hundred ninety-three thousand, thirty-nine".