71705087 has 6 divisors (see below), whose sum is σ = 72393048. Its totient is φ = 71023604.

The previous prime is 71705063. The next prime is 71705113. The reversal of 71705087 is 78050717.

It is not a de Polignac number, because 71705087 - 2¹⁶ = 71639551 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 (71705027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8318 + ... + 14580.

It is an arithmetic number, because the mean of its divisors is an integer number (12065508).

Almost surely, 2^71705087 is an apocalyptic number.

71705087 is a deficient number, since it is larger than the sum of its proper divisors (687961).

71705087 is an equidigital number, since it uses as much as digits as its factorization.

71705087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6477 (or 6370 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 35.

The square root of 71705087 is about 8467.8856274751. The cubic root of 71705087 is about 415.4479838421.

The spelling of 71705087 in words is "seventy-one million, seven hundred five thousand, eighty-seven".