678501089 has 6 divisors (see below), whose sum is σ = 789276834. Its totient is φ = 581572320.

The previous prime is 678501073. The next prime is 678501097. The reversal of 678501089 is 980105876.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 658179025 + 20322064 = 25655^2 + 4508^2 .

It is not a de Polignac number, because 678501089 - 2⁴ = 678501073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678501289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6923432 + ... + 6923529.

It is an arithmetic number, because the mean of its divisors is an integer number (131546139).

Almost surely, 2^678501089 is an apocalyptic number.

It is an amenable number.

678501089 is a deficient number, since it is larger than the sum of its proper divisors (110775745).

678501089 is a wasteful number, since it uses less digits than its factorization.

678501089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13846975 (or 13846968 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 678501089 is about 26048.0534589439. The cubic root of 678501089 is about 878.7193359311.

The spelling of 678501089 in words is "six hundred seventy-eight million, five hundred one thousand, eighty-nine".