78042863 has 2 divisors, whose sum is σ = 78042864. Its totient is φ = 78042862.

The previous prime is 78042859. The next prime is 78042907. The reversal of 78042863 is 36824087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78042863 - 2² = 78042859 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78062863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39021431 + 39021432.

It is an arithmetic number, because the mean of its divisors is an integer number (39021432).

Almost surely, 2^78042863 is an apocalyptic number.

78042863 is a deficient number, since it is larger than the sum of its proper divisors (1).

78042863 is an equidigital number, since it uses as much as digits as its factorization.

78042863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 78042863 is about 8834.1871725700. The cubic root of 78042863 is about 427.3441183547.

The spelling of 78042863 in words is "seventy-eight million, forty-two thousand, eight hundred sixty-three".