78965 has 8 divisors (see below), whose sum is σ = 100440. Its totient is φ = 59392.

The previous prime is 78941. The next prime is 78977. The reversal of 78965 is 56987.

It can be written as a sum of positive squares in 4 ways, for example, as 1681 + 77284 = 41^2 + 278^2 .

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 78965 - 2⁶ = 78901 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380 + ... + 549.

It is an arithmetic number, because the mean of its divisors is an integer number (12555).

2⁷⁸⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

78965 is a deficient number, since it is larger than the sum of its proper divisors (21475).

78965 is a wasteful number, since it uses less digits than its factorization.

78965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951.

The product of its digits is 15120, while the sum is 35.

The square root of 78965 is about 281.0071173476. The cubic root of 78965 is about 42.9020666501.

The spelling of 78965 in words is "seventy-eight thousand, nine hundred sixty-five".