678084291 has 10 divisors (see below), whose sum is σ = 1012940852. Its totient is φ = 452056140.

The previous prime is 678084271. The next prime is 678084299. The reversal of 678084291 is 192480876.

It is not a de Polignac number, because 678084291 - 2⁵ = 678084259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678084299) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4185625 + ... + 4185786.

Almost surely, 2^678084291 is an apocalyptic number.

678084291 is a deficient number, since it is larger than the sum of its proper divisors (334856561).

678084291 is an equidigital number, since it uses as much as digits as its factorization.

678084291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8371423 (or 8371414 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 678084291 is about 26040.0516704556. The cubic root of 678084291 is about 878.5393688990.

The spelling of 678084291 in words is "six hundred seventy-eight million, eighty-four thousand, two hundred ninety-one".