71969816 has 16 divisors (see below), whose sum is σ = 135062640. Its totient is φ = 35953120.

The previous prime is 71969809. The next prime is 71969861. The reversal of 71969816 is 61896917.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7646 + ... + 14226.

It is an arithmetic number, because the mean of its divisors is an integer number (8441415).

Almost surely, 2^71969816 is an apocalyptic number.

It is an amenable number.

71969816 is a deficient number, since it is larger than the sum of its proper divisors (63092824).

71969816 is a wasteful number, since it uses less digits than its factorization.

71969816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7954 (or 7950 counting only the distinct ones).

The product of its digits is 163296, while the sum is 47.

The square root of 71969816 is about 8483.5025785344. The cubic root of 71969816 is about 415.9586219939.

The spelling of 71969816 in words is "seventy-one million, nine hundred sixty-nine thousand, eight hundred sixteen".