9671645 has 8 divisors (see below), whose sum is σ = 12006360. Its totient is φ = 7470400.

The previous prime is 9671639. The next prime is 9671647. The reversal of 9671645 is 5461769.

It can be written as a sum of positive squares in 4 ways, for example, as 466489 + 9205156 = 683^2 + 3034^2 .

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

It is not a de Polignac number, because 9671645 - 2⁶ = 9671581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9671599 and 9671608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9671647) 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, 33206 + ... + 33495.

It is an arithmetic number, because the mean of its divisors is an integer number (1500795).

Almost surely, 2^9671645 is an apocalyptic number.

It is an amenable number.

9671645 is a deficient number, since it is larger than the sum of its proper divisors (2334715).

9671645 is a wasteful number, since it uses less digits than its factorization.

9671645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66735.

The product of its digits is 45360, while the sum is 38.

The square root of 9671645 is about 3109.9268480143. The cubic root of 9671645 is about 213.0591135420.

The spelling of 9671645 in words is "nine million, six hundred seventy-one thousand, six hundred forty-five".