9969399 has 40 divisors (see below), whose sum is σ = 16587648. Its totient is φ = 5916240.

The previous prime is 9969397. The next prime is 9969431. The reversal of 9969399 is 9939699.

It is not a de Polignac number, because 9969399 - 2¹ = 9969397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9969397) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 59614 + ... + 59780.

Almost surely, 2^9969399 is an apocalyptic number.

9969399 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

9969399 is a deficient number, since it is larger than the sum of its proper divisors (6618249).

9969399 is a wasteful number, since it uses less digits than its factorization.

9969399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 248 counting only the distinct ones).

The product of its digits is 1062882, while the sum is 54.

The square root of 9969399 is about 3157.4355100303. The cubic root of 9969399 is about 215.2234849395.

The spelling of 9969399 in words is "nine million, nine hundred sixty-nine thousand, three hundred ninety-nine".