71723785 has 16 divisors (see below), whose sum is σ = 100653696. Its totient is φ = 48037248.

The previous prime is 71723783. The next prime is 71723789. The reversal of 71723785 is 58732717.

It is not a de Polignac number, because 71723785 - 2¹ = 71723783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71723783) 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 15 ways as a sum of consecutive naturals, for example, 22324 + ... + 25333.

It is an arithmetic number, because the mean of its divisors is an integer number (6290856).

Almost surely, 2^71723785 is an apocalyptic number.

It is an amenable number.

71723785 is a deficient number, since it is larger than the sum of its proper divisors (28929911).

71723785 is a wasteful number, since it uses less digits than its factorization.

71723785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47712.

The product of its digits is 82320, while the sum is 40.

The square root of 71723785 is about 8468.9896091565. The cubic root of 71723785 is about 415.4840917931.

The spelling of 71723785 in words is "seventy-one million, seven hundred twenty-three thousand, seven hundred eighty-five".