78864743 has 2 divisors, whose sum is σ = 78864744. Its totient is φ = 78864742.

The previous prime is 78864719. The next prime is 78864749. The reversal of 78864743 is 34746887.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78864743 - 2¹² = 78860647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78864749) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39432371 + 39432372.

It is an arithmetic number, because the mean of its divisors is an integer number (39432372).

Almost surely, 2^78864743 is an apocalyptic number.

78864743 is a deficient number, since it is larger than the sum of its proper divisors (1).

78864743 is an equidigital number, since it uses as much as digits as its factorization.

78864743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 47.

The square root of 78864743 is about 8880.5823570304. The cubic root of 78864743 is about 428.8390225605.

The spelling of 78864743 in words is "seventy-eight million, eight hundred sixty-four thousand, seven hundred forty-three".