71712769 has 8 divisors (see below), whose sum is σ = 73215360. Its totient is φ = 70224000.

The previous prime is 71712761. The next prime is 71712811. The reversal of 71712769 is 96721717.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71712769 - 2³ = 71712761 is a prime.

It is a super-2 number, since 2×71712769² = 10285442475294722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71712761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7377 + ... + 14065.

It is an arithmetic number, because the mean of its divisors is an integer number (9151920).

It is a Proth number, since it is equal to 4377 ⋅ 2¹⁴ + 1 and 4377 < 2¹⁴.

Almost surely, 2^71712769 is an apocalyptic number.

It is an amenable number.

71712769 is a deficient number, since it is larger than the sum of its proper divisors (1502591).

71712769 is a wasteful number, since it uses less digits than its factorization.

71712769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6911.

The product of its digits is 37044, while the sum is 40.

The square root of 71712769 is about 8468.3392114393. The cubic root of 71712769 is about 415.4628194118.

The spelling of 71712769 in words is "seventy-one million, seven hundred twelve thousand, seven hundred sixty-nine".