78964689 has 8 divisors (see below), whose sum is σ = 105868672. Its totient is φ = 52351920.

The previous prime is 78964679. The next prime is 78964759. The reversal of 78964689 is 98646987.

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

It is not a de Polignac number, because 78964689 - 2⁴ = 78964673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78964619) 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, 72169 + ... + 73254.

It is an arithmetic number, because the mean of its divisors is an integer number (13233584).

Almost surely, 2^78964689 is an apocalyptic number.

It is an amenable number.

78964689 is a deficient number, since it is larger than the sum of its proper divisors (26903983).

78964689 is a wasteful number, since it uses less digits than its factorization.

78964689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145607.

The product of its digits is 5225472, while the sum is 57.

The square root of 78964689 is about 8886.2077963550. The cubic root of 78964689 is about 429.0201032738.

The spelling of 78964689 in words is "seventy-eight million, nine hundred sixty-four thousand, six hundred eighty-nine".