78683369 has 4 divisors (see below), whose sum is σ = 79379796. Its totient is φ = 77986944.

The previous prime is 78683359. The next prime is 78683383. The reversal of 78683369 is 96338687.

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 26915344 + 51768025 = 5188^2 + 7195^2 .

It is a cyclic number.

It is not a de Polignac number, because 78683369 - 2⁸ = 78683113 is a prime.

It is a super-3 number, since 3×78683369³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78683329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348044 + ... + 348269.

It is an arithmetic number, because the mean of its divisors is an integer number (19844949).

Almost surely, 2^78683369 is an apocalyptic number.

It is an amenable number.

78683369 is a deficient number, since it is larger than the sum of its proper divisors (696427).

78683369 is a wasteful number, since it uses less digits than its factorization.

78683369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696426.

The product of its digits is 1306368, while the sum is 50.

The square root of 78683369 is about 8870.3646486489. The cubic root of 78683369 is about 428.5100206566.

The spelling of 78683369 in words is "seventy-eight million, six hundred eighty-three thousand, three hundred sixty-nine".