678853609 has 8 divisors (see below), whose sum is σ = 776495808. Its totient is φ = 581377200.

The previous prime is 678853607. The next prime is 678853661. The reversal of 678853609 is 906358876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 678853609 - 2¹ = 678853607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678853607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32542 + ... + 49159.

It is an arithmetic number, because the mean of its divisors is an integer number (97061976).

Almost surely, 2^678853609 is an apocalyptic number.

It is an amenable number.

678853609 is a deficient number, since it is larger than the sum of its proper divisors (97642199).

678853609 is a wasteful number, since it uses less digits than its factorization.

678853609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82895.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 678853609 is about 26054.8193046891. The cubic root of 678853609 is about 878.8714911813.

The spelling of 678853609 in words is "six hundred seventy-eight million, eight hundred fifty-three thousand, six hundred nine".