78582271 has 4 divisors (see below), whose sum is σ = 82718200. Its totient is φ = 74446344.

The previous prime is 78582247. The next prime is 78582289. The reversal of 78582271 is 17228587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17228587 = 23 ⋅749069.

It is a cyclic number.

It is not a de Polignac number, because 78582271 - 2¹⁷ = 78451199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78582221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2067936 + ... + 2067973.

It is an arithmetic number, because the mean of its divisors is an integer number (20679550).

Almost surely, 2^78582271 is an apocalyptic number.

78582271 is a deficient number, since it is larger than the sum of its proper divisors (4135929).

78582271 is a wasteful number, since it uses less digits than its factorization.

78582271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135928.

The product of its digits is 62720, while the sum is 40.

The square root of 78582271 is about 8864.6641786364. The cubic root of 78582271 is about 428.3264152600.

The spelling of 78582271 in words is "seventy-eight million, five hundred eighty-two thousand, two hundred seventy-one".