9971799 has 4 divisors (see below), whose sum is σ = 13295736. Its totient is φ = 6647864.

The previous prime is 9971783. The next prime is 9971807.

9971799 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9971799 - 2⁴ = 9971783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9971729) 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, 1661964 + ... + 1661969.

It is an arithmetic number, because the mean of its divisors is an integer number (3323934).

Almost surely, 2^9971799 is an apocalyptic number.

9971799 is a deficient number, since it is larger than the sum of its proper divisors (3323937).

9971799 is a wasteful number, since it uses less digits than its factorization.

9971799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323936.

The product of its digits is 321489, while the sum is 51.

The square root of 9971799 is about 3157.8155424280. The cubic root of 9971799 is about 215.2407542827.

The spelling of 9971799 in words is "nine million, nine hundred seventy-one thousand, seven hundred ninety-nine".