71334639 has 6 divisors (see below), whose sum is σ = 103038936. Its totient is φ = 47556420.

The previous prime is 71334589. The next prime is 71334701. The reversal of 71334639 is 93643317.

71334639 is a `hidden beast` number, since 7 + 13 + 3 + 4 + 639 = 666.

It is not a de Polignac number, because 71334639 - 2⁷ = 71334511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71338639) 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, 3963027 + ... + 3963044.

It is an arithmetic number, because the mean of its divisors is an integer number (17173156).

Almost surely, 2^71334639 is an apocalyptic number.

71334639 is a deficient number, since it is larger than the sum of its proper divisors (31704297).

71334639 is a wasteful number, since it uses less digits than its factorization.

71334639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7926077 (or 7926074 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The square root of 71334639 is about 8445.9836016890. The cubic root of 71334639 is about 414.7313091148.

The spelling of 71334639 in words is "seventy-one million, three hundred thirty-four thousand, six hundred thirty-nine".