678829265 has 4 divisors (see below), whose sum is σ = 814595124. Its totient is φ = 543063408.

The previous prime is 678829259. The next prime is 678829267. The reversal of 678829265 is 562928876.

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

It can be written as a sum of positive squares in 2 ways, for example, as 217739536 + 461089729 = 14756^2 + 21473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678829265 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678829267) 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, 67882922 + ... + 67882931.

It is an arithmetic number, because the mean of its divisors is an integer number (203648781).

Almost surely, 2^678829265 is an apocalyptic number.

It is an amenable number.

678829265 is a deficient number, since it is larger than the sum of its proper divisors (135765859).

678829265 is a wasteful number, since it uses less digits than its factorization.

678829265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135765858.

The product of its digits is 2903040, while the sum is 53.

The square root of 678829265 is about 26054.3521316497. The cubic root of 678829265 is about 878.8609854782.

The spelling of 678829265 in words is "six hundred seventy-eight million, eight hundred twenty-nine thousand, two hundred sixty-five".