78564763 has 2 divisors, whose sum is σ = 78564764. Its totient is φ = 78564762.

The previous prime is 78564751. The next prime is 78564779. The reversal of 78564763 is 36746587.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78564763 is a prime.

It is not a weakly prime, because it can be changed into another prime (78564793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39282381 + 39282382.

It is an arithmetic number, because the mean of its divisors is an integer number (39282382).

Almost surely, 2^78564763 is an apocalyptic number.

78564763 is a deficient number, since it is larger than the sum of its proper divisors (1).

78564763 is an equidigital number, since it uses as much as digits as its factorization.

78564763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 46.

The square root of 78564763 is about 8863.6766073678. The cubic root of 78564763 is about 428.2946027584.

The spelling of 78564763 in words is "seventy-eight million, five hundred sixty-four thousand, seven hundred sixty-three".