71704871 has 4 divisors (see below), whose sum is σ = 81948432. Its totient is φ = 61461312.

The previous prime is 71704847. The next prime is 71704889. The reversal of 71704871 is 17840717.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71704871 - 2¹⁸ = 71442727 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 (71704571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5121770 + ... + 5121783.

It is an arithmetic number, because the mean of its divisors is an integer number (20487108).

Almost surely, 2^71704871 is an apocalyptic number.

71704871 is a deficient number, since it is larger than the sum of its proper divisors (10243561).

71704871 is a wasteful number, since it uses less digits than its factorization.

71704871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10243560.

The product of its (nonzero) digits is 10976, while the sum is 35.

The square root of 71704871 is about 8467.8728733962. The cubic root of 71704871 is about 415.4475666851.

The spelling of 71704871 in words is "seventy-one million, seven hundred four thousand, eight hundred seventy-one".