678000999 has 8 divisors (see below), whose sum is σ = 973539952. Its totient is φ = 417231360.

The previous prime is 678000979. The next prime is 678001003. The reversal of 678000999 is 999000876.

It is a happy number.

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

It is not a de Polignac number, because 678000999 - 2¹² = 677996903 is a prime.

It is a Duffinian number.

678000999 is a modest number, since divided by 999 gives 678 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678000979) 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, 8692282 + ... + 8692359.

It is an arithmetic number, because the mean of its divisors is an integer number (121692494).

Almost surely, 2^678000999 is an apocalyptic number.

678000999 is a deficient number, since it is larger than the sum of its proper divisors (295538953).

678000999 is a wasteful number, since it uses less digits than its factorization.

678000999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17384657.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 678000999 is about 26038.4523157579. The cubic root of 678000999 is about 878.5033958405.

The spelling of 678000999 in words is "six hundred seventy-eight million, nine hundred ninety-nine", and thus it is an aban number.