71723085 has 64 divisors (see below), whose sum is σ = 144986112. Its totient is φ = 29500416.

The previous prime is 71723077. The next prime is 71723089. The reversal of 71723085 is 58032717.

It is not a de Polignac number, because 71723085 - 2³ = 71723077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71723089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40182 + ... + 41928.

It is an arithmetic number, because the mean of its divisors is an integer number (2265408).

Almost surely, 2^71723085 is an apocalyptic number.

It is an amenable number.

71723085 is an abundant number, since it is smaller than the sum of its proper divisors (73263027).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71723085 is a wasteful number, since it uses less digits than its factorization.

71723085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 71723085 is about 8468.9482818116. The cubic root of 71723085 is about 415.4827401271.

The spelling of 71723085 in words is "seventy-one million, seven hundred twenty-three thousand, eighty-five".