71047279 has 2 divisors, whose sum is σ = 71047280. Its totient is φ = 71047278.

The previous prime is 71047271. The next prime is 71047297. The reversal of 71047279 is 97274017.

Together with next prime (71047297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71047279 - 2³ = 71047271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71047271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35523639 + 35523640.

It is an arithmetic number, because the mean of its divisors is an integer number (35523640).

Almost surely, 2^71047279 is an apocalyptic number.

71047279 is a deficient number, since it is larger than the sum of its proper divisors (1).

71047279 is an equidigital number, since it uses as much as digits as its factorization.

71047279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 71047279 is about 8428.9547987873. The cubic root of 71047279 is about 414.1736670940.

The spelling of 71047279 in words is "seventy-one million, forty-seven thousand, two hundred seventy-nine".