78570859 has 2 divisors, whose sum is σ = 78570860. Its totient is φ = 78570858.

The previous prime is 78570853. The next prime is 78570907. The reversal of 78570859 is 95807587.

It is a weak prime.

It is an emirp because it is prime and its reverse (95807587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78570859 - 2⁵ = 78570827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78570853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39285429 + 39285430.

It is an arithmetic number, because the mean of its divisors is an integer number (39285430).

Almost surely, 2^78570859 is an apocalyptic number.

78570859 is a deficient number, since it is larger than the sum of its proper divisors (1).

78570859 is an equidigital number, since it uses as much as digits as its factorization.

78570859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 49.

The square root of 78570859 is about 8864.0204760594. The cubic root of 78570859 is about 428.3056798888.

The spelling of 78570859 in words is "seventy-eight million, five hundred seventy thousand, eight hundred fifty-nine".