78559241 has 2 divisors, whose sum is σ = 78559242. Its totient is φ = 78559240.

The previous prime is 78559223. The next prime is 78559253. The reversal of 78559241 is 14295587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77070841 + 1488400 = 8779^2 + 1220^2 .

It is an emirp because it is prime and its reverse (14295587) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78559241 is a prime.

It is not a weakly prime, because it can be changed into another prime (78559291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39279620 + 39279621.

It is an arithmetic number, because the mean of its divisors is an integer number (39279621).

Almost surely, 2^78559241 is an apocalyptic number.

It is an amenable number.

78559241 is a deficient number, since it is larger than the sum of its proper divisors (1).

78559241 is an equidigital number, since it uses as much as digits as its factorization.

78559241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The square root of 78559241 is about 8863.3651058726. The cubic root of 78559241 is about 428.2845681571.

The spelling of 78559241 in words is "seventy-eight million, five hundred fifty-nine thousand, two hundred forty-one".