78869 has 8 divisors (see below), whose sum is σ = 95040. Its totient is φ = 63936.

The previous prime is 78857. The next prime is 78877. The reversal of 78869 is 96887.

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 78869 - 2⁴ = 78853 is a prime.

It is a super-2 number, since 2×78869² = 12440638322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164 + ... + 429.

It is an arithmetic number, because the mean of its divisors is an integer number (11880).

2⁷⁸⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

78869 is a deficient number, since it is larger than the sum of its proper divisors (16171).

78869 is a wasteful number, since it uses less digits than its factorization.

78869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619.

The product of its digits is 24192, while the sum is 38.

The square root of 78869 is about 280.8362512212. The cubic root of 78869 is about 42.8846738450.

The spelling of 78869 in words is "seventy-eight thousand, eight hundred sixty-nine".