678883081 has 4 divisors (see below), whose sum is σ = 679679812. Its totient is φ = 678086352.

The previous prime is 678883063. The next prime is 678883099. The reversal of 678883081 is 180388876.

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

It is an interprime number because it is at equal distance from previous prime (678883063) and next prime (678883099).

It can be written as a sum of positive squares in 2 ways, for example, as 213014025 + 465869056 = 14595^2 + 21584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678883081 is a prime.

It is a super-3 number, since 3×678883081³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678883021) 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, 397086 + ... + 398791.

It is an arithmetic number, because the mean of its divisors is an integer number (169919953).

Almost surely, 2^678883081 is an apocalyptic number.

It is an amenable number.

678883081 is a deficient number, since it is larger than the sum of its proper divisors (796731).

678883081 is an equidigital number, since it uses as much as digits as its factorization.

678883081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796730.

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 678883081 is about 26055.3848752998. The cubic root of 678883081 is about 878.8842095472.

The spelling of 678883081 in words is "six hundred seventy-eight million, eight hundred eighty-three thousand, eighty-one".