78859271 has 2 divisors, whose sum is σ = 78859272. Its totient is φ = 78859270.

The previous prime is 78859241. The next prime is 78859309. The reversal of 78859271 is 17295887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78859271 - 2¹⁴ = 78842887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78859241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39429635 + 39429636.

It is an arithmetic number, because the mean of its divisors is an integer number (39429636).

Almost surely, 2^78859271 is an apocalyptic number.

78859271 is a deficient number, since it is larger than the sum of its proper divisors (1).

78859271 is an equidigital number, since it uses as much as digits as its factorization.

78859271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 47.

The square root of 78859271 is about 8880.2742637826. The cubic root of 78859271 is about 428.8291040540.

The spelling of 78859271 in words is "seventy-eight million, eight hundred fifty-nine thousand, two hundred seventy-one".