71613685 has 32 divisors (see below), whose sum is σ = 103727232. Its totient is φ = 46759680.

The previous prime is 71613683. The next prime is 71613701. The reversal of 71613685 is 58631617.

It is not a de Polignac number, because 71613685 - 2¹ = 71613683 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71613683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25102 + ... + 27808.

It is an arithmetic number, because the mean of its divisors is an integer number (3241476).

Almost surely, 2^71613685 is an apocalyptic number.

It is an amenable number.

71613685 is a deficient number, since it is larger than the sum of its proper divisors (32113547).

71613685 is a wasteful number, since it uses less digits than its factorization.

71613685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773.

The product of its digits is 30240, while the sum is 37.

The square root of 71613685 is about 8462.4869276118. The cubic root of 71613685 is about 415.2713858526.

The spelling of 71613685 in words is "seventy-one million, six hundred thirteen thousand, six hundred eighty-five".