9671729 has 4 divisors (see below), whose sum is σ = 9680484. Its totient is φ = 9662976.

The previous prime is 9671687. The next prime is 9671731. The reversal of 9671729 is 9271769.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7263025 + 2408704 = 2695^2 + 1552^2 .

It is a cyclic number.

It is not a de Polignac number, because 9671729 - 2¹² = 9667633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9671749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2432 + ... + 5025.

It is an arithmetic number, because the mean of its divisors is an integer number (2420121).

Almost surely, 2^9671729 is an apocalyptic number.

It is an amenable number.

9671729 is a deficient number, since it is larger than the sum of its proper divisors (8755).

9671729 is a wasteful number, since it uses less digits than its factorization.

9671729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8754.

The product of its digits is 47628, while the sum is 41.

The square root of 9671729 is about 3109.9403531258. The cubic root of 9671729 is about 213.0597303593.

The spelling of 9671729 in words is "nine million, six hundred seventy-one thousand, seven hundred twenty-nine".