71139416 has 8 divisors (see below), whose sum is σ = 133386420. Its totient is φ = 35569704.

The previous prime is 71139403. The next prime is 71139443. The reversal of 71139416 is 61493117.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4446206 + ... + 4446221.

Almost surely, 2^71139416 is an apocalyptic number.

It is an amenable number.

71139416 is a deficient number, since it is larger than the sum of its proper divisors (62247004).

71139416 is a wasteful number, since it uses less digits than its factorization.

71139416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8892433 (or 8892429 counting only the distinct ones).

The product of its digits is 4536, while the sum is 32.

The square root of 71139416 is about 8434.4185336038. The cubic root of 71139416 is about 414.3526288382.

The spelling of 71139416 in words is "seventy-one million, one hundred thirty-nine thousand, four hundred sixteen".