9997939 has 8 divisors (see below), whose sum is σ = 11923200. Its totient is φ = 8196936.

The previous prime is 9997937. The next prime is 9997951. The reversal of 9997939 is 9397999.

9997939 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 9997939 - 2¹ = 9997937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9997939.

It is not an unprimeable number, because it can be changed into a prime (9997937) 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, 30889 + ... + 31210.

It is an arithmetic number, because the mean of its divisors is an integer number (1490400).

Almost surely, 2^9997939 is an apocalyptic number.

9997939 is a deficient number, since it is larger than the sum of its proper divisors (1925261).

9997939 is a wasteful number, since it uses less digits than its factorization.

9997939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62129.

The product of its digits is 1240029, while the sum is 55.

The square root of 9997939 is about 3161.9517706632. The cubic root of 9997939 is about 215.4286670199.

The spelling of 9997939 in words is "nine million, nine hundred ninety-seven thousand, nine hundred thirty-nine".