78789863 has 2 divisors, whose sum is σ = 78789864. Its totient is φ = 78789862.

The previous prime is 78789833. The next prime is 78789877. The reversal of 78789863 is 36898787.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78789863 - 2¹⁸ = 78527719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78789799 and 78789808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78789833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39394931 + 39394932.

It is an arithmetic number, because the mean of its divisors is an integer number (39394932).

Almost surely, 2^78789863 is an apocalyptic number.

78789863 is a deficient number, since it is larger than the sum of its proper divisors (1).

78789863 is an equidigital number, since it uses as much as digits as its factorization.

78789863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 56.

The square root of 78789863 is about 8876.3654160923. The cubic root of 78789863 is about 428.7032557901.

The spelling of 78789863 in words is "seventy-eight million, seven hundred eighty-nine thousand, eight hundred sixty-three".