78036863 has 4 divisors (see below), whose sum is σ = 78208080. Its totient is φ = 77865648.

The previous prime is 78036839. The next prime is 78036887. The reversal of 78036863 is 36863087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36863087 = 47 ⋅784321.

It is an interprime number because it is at equal distance from previous prime (78036839) and next prime (78036887).

It is a cyclic number.

It is not a de Polignac number, because 78036863 - 2⁶ = 78036799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78036863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78036823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84923 + ... + 85836.

It is an arithmetic number, because the mean of its divisors is an integer number (19552020).

Almost surely, 2^78036863 is an apocalyptic number.

78036863 is a deficient number, since it is larger than the sum of its proper divisors (171217).

78036863 is a wasteful number, since it uses less digits than its factorization.

78036863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171216.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 78036863 is about 8833.8475762263. The cubic root of 78036863 is about 427.3331665507. Note that the first 3 decimals are identical.

The spelling of 78036863 in words is "seventy-eight million, thirty-six thousand, eight hundred sixty-three".