8971649 has 8 divisors (see below), whose sum is σ = 9430080. Its totient is φ = 8524656.

The previous prime is 8971639. The next prime is 8971657. The reversal of 8971649 is 9461798.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8971649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8971619) 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, 1229 + ... + 4410.

It is an arithmetic number, because the mean of its divisors is an integer number (1178760).

Almost surely, 2^8971649 is an apocalyptic number.

It is an amenable number.

8971649 is a deficient number, since it is larger than the sum of its proper divisors (458431).

8971649 is a wasteful number, since it uses less digits than its factorization.

8971649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5719.

The product of its digits is 108864, while the sum is 44.

The square root of 8971649 is about 2995.2711062607. The cubic root of 8971649 is about 207.7897360521.

The spelling of 8971649 in words is "eight million, nine hundred seventy-one thousand, six hundred forty-nine".