78966593 has 2 divisors, whose sum is σ = 78966594. Its totient is φ = 78966592.

The previous prime is 78966577. The next prime is 78966617. The reversal of 78966593 is 39566987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52823824 + 26142769 = 7268^2 + 5113^2 .

It is a cyclic number.

It is not a de Polignac number, because 78966593 - 2⁴ = 78966577 is a prime.

It is not a weakly prime, because it can be changed into another prime (78966523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39483296 + 39483297.

It is an arithmetic number, because the mean of its divisors is an integer number (39483297).

Almost surely, 2^78966593 is an apocalyptic number.

It is an amenable number.

78966593 is a deficient number, since it is larger than the sum of its proper divisors (1).

78966593 is an equidigital number, since it uses as much as digits as its factorization.

78966593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The square root of 78966593 is about 8886.3149280228. The cubic root of 78966593 is about 429.0235514299.

The spelling of 78966593 in words is "seventy-eight million, nine hundred sixty-six thousand, five hundred ninety-three".