78964447039 has 2 divisors, whose sum is σ = 78964447040. Its totient is φ = 78964447038.

The previous prime is 78964446971. The next prime is 78964447063. The reversal of 78964447039 is 93074446987.

It is a strong prime.

It is an emirp because it is prime and its reverse (93074446987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78964447039 - 2⁹ = 78964446527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78964447069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39482223519 + 39482223520.

It is an arithmetic number, because the mean of its divisors is an integer number (39482223520).

Almost surely, 2^78964447039 is an apocalyptic number.

78964447039 is a deficient number, since it is larger than the sum of its proper divisors (1).

78964447039 is an equidigital number, since it uses as much as digits as its factorization.

78964447039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36578304, while the sum is 61.

The spelling of 78964447039 in words is "seventy-eight billion, nine hundred sixty-four million, four hundred forty-seven thousand, thirty-nine".