78964339 has 2 divisors, whose sum is σ = 78964340. Its totient is φ = 78964338.

The previous prime is 78964331. The next prime is 78964351. The reversal of 78964339 is 93346987.

It is a weak prime.

It is an emirp because it is prime and its reverse (93346987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78964339 - 2³ = 78964331 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78964292 and 78964301.

It is not a weakly prime, because it can be changed into another prime (78964331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39482169 + 39482170.

It is an arithmetic number, because the mean of its divisors is an integer number (39482170).

Almost surely, 2^78964339 is an apocalyptic number.

78964339 is a deficient number, since it is larger than the sum of its proper divisors (1).

78964339 is an equidigital number, since it uses as much as digits as its factorization.

78964339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The square root of 78964339 is about 8886.1881028932. The cubic root of 78964339 is about 429.0194694156.

The spelling of 78964339 in words is "seventy-eight million, nine hundred sixty-four thousand, three hundred thirty-nine".