78982559 has 2 divisors, whose sum is σ = 78982560. Its totient is φ = 78982558.

The previous prime is 78982517. The next prime is 78982567. The reversal of 78982559 is 95528987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78982559 - 2¹² = 78978463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78982559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78982159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39491279 + 39491280.

It is an arithmetic number, because the mean of its divisors is an integer number (39491280).

Almost surely, 2^78982559 is an apocalyptic number.

78982559 is a deficient number, since it is larger than the sum of its proper divisors (1).

78982559 is an equidigital number, since it uses as much as digits as its factorization.

78982559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 53.

The square root of 78982559 is about 8887.2132302539. The cubic root of 78982559 is about 429.0524637761.

The spelling of 78982559 in words is "seventy-eight million, nine hundred eighty-two thousand, five hundred fifty-nine".