78963239 has 2 divisors, whose sum is σ = 78963240. Its totient is φ = 78963238.

The previous prime is 78963233. The next prime is 78963271. The reversal of 78963239 is 93236987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78963239 - 2⁴ = 78963223 is a prime.

It is a super-2 number, since 2×78963239² = 12470386226742242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78963193 and 78963202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78963233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39481619 + 39481620.

It is an arithmetic number, because the mean of its divisors is an integer number (39481620).

Almost surely, 2^78963239 is an apocalyptic number.

78963239 is a deficient number, since it is larger than the sum of its proper divisors (1).

78963239 is an equidigital number, since it uses as much as digits as its factorization.

78963239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The square root of 78963239 is about 8886.1262088719. The cubic root of 78963239 is about 429.0174772775.

The spelling of 78963239 in words is "seventy-eight million, nine hundred sixty-three thousand, two hundred thirty-nine".