71216769 has 24 divisors (see below), whose sum is σ = 108248160. Its totient is φ = 41513472.

The previous prime is 71216741. The next prime is 71216771. The reversal of 71216769 is 96761217.

It is a de Polignac number, because none of the positive numbers 2^k-71216769 is a prime.

It is a super-2 number, since 2×71216769² = 10143656373598722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (71216869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5937 + ... + 13329.

It is an arithmetic number, because the mean of its divisors is an integer number (4510340).

Almost surely, 2^71216769 is an apocalyptic number.

It is an amenable number.

71216769 is a deficient number, since it is larger than the sum of its proper divisors (37031391).

71216769 is a wasteful number, since it uses less digits than its factorization.

71216769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7441 (or 7428 counting only the distinct ones).

The product of its digits is 31752, while the sum is 39.

The square root of 71216769 is about 8439.0028439384. The cubic root of 71216769 is about 414.5027556865.

The spelling of 71216769 in words is "seventy-one million, two hundred sixteen thousand, seven hundred sixty-nine".