678712281 has 24 divisors (see below), whose sum is σ = 1031505120. Its totient is φ = 395680896.

The previous prime is 678712241. The next prime is 678712303. The reversal of 678712281 is 182217876.

678712281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 678712281 - 2²³ = 670323673 is a prime.

It is a super-2 number, since 2×678712281² = 921300720760445922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678712231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25596 + ... + 44861.

It is an arithmetic number, because the mean of its divisors is an integer number (42979380).

Almost surely, 2^678712281 is an apocalyptic number.

It is an amenable number.

678712281 is a deficient number, since it is larger than the sum of its proper divisors (352792839).

678712281 is a wasteful number, since it uses less digits than its factorization.

678712281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70505 (or 70492 counting only the distinct ones).

The product of its digits is 75264, while the sum is 42.

The square root of 678712281 is about 26052.1070357083. The cubic root of 678712281 is about 878.8104972895.

The spelling of 678712281 in words is "six hundred seventy-eight million, seven hundred twelve thousand, two hundred eighty-one".