78969593 has 2 divisors, whose sum is σ = 78969594. Its totient is φ = 78969592.

The previous prime is 78969559. The next prime is 78969601. The reversal of 78969593 is 39596987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70425664 + 8543929 = 8392^2 + 2923^2 .

It is an emirp because it is prime and its reverse (39596987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78969593 - 2⁸ = 78969337 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78960593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39484796 + 39484797.

It is an arithmetic number, because the mean of its divisors is an integer number (39484797).

Almost surely, 2^78969593 is an apocalyptic number.

It is an amenable number.

78969593 is a deficient number, since it is larger than the sum of its proper divisors (1).

78969593 is an equidigital number, since it uses as much as digits as its factorization.

78969593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 56.

The square root of 78969593 is about 8886.4837252988. The cubic root of 78969593 is about 429.0289843364.

The spelling of 78969593 in words is "seventy-eight million, nine hundred sixty-nine thousand, five hundred ninety-three".