78860329 has 2 divisors, whose sum is σ = 78860330. Its totient is φ = 78860328.

The previous prime is 78860291. The next prime is 78860333. The reversal of 78860329 is 92306887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78854400 + 5929 = 8880^2 + 77^2 .

It is a cyclic number.

It is not a de Polignac number, because 78860329 - 2¹¹ = 78858281 is a prime.

It is not a weakly prime, because it can be changed into another prime (78861329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39430164 + 39430165.

It is an arithmetic number, because the mean of its divisors is an integer number (39430165).

Almost surely, 2^78860329 is an apocalyptic number.

It is an amenable number.

78860329 is a deficient number, since it is larger than the sum of its proper divisors (1).

78860329 is an equidigital number, since it uses as much as digits as its factorization.

78860329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 78860329 is about 8880.3338338150. Note that the first 3 decimals coincide. The cubic root of 78860329 is about 428.8310218127.

The spelling of 78860329 in words is "seventy-eight million, eight hundred sixty thousand, three hundred twenty-nine".