678996427 has 8 divisors (see below), whose sum is σ = 689958000. Its totient is φ = 668120544.

The previous prime is 678996377. The next prime is 678996431. The reversal of 678996427 is 724699876.

678996427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 678996427 - 2²⁷ = 544778699 is a prime.

It is a super-2 number, since 2×678996427² = 922072295757532658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678996457) 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, 5352 + ... + 37237.

It is an arithmetic number, because the mean of its divisors is an integer number (86244750).

Almost surely, 2^678996427 is an apocalyptic number.

678996427 is a deficient number, since it is larger than the sum of its proper divisors (10961573).

678996427 is a wasteful number, since it uses less digits than its factorization.

678996427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42845.

The product of its digits is 9144576, while the sum is 58.

The square root of 678996427 is about 26057.5598819229. The cubic root of 678996427 is about 878.9331195234.

The spelling of 678996427 in words is "six hundred seventy-eight million, nine hundred ninety-six thousand, four hundred twenty-seven".