16996399 has 4 divisors (see below), whose sum is σ = 19424464. Its totient is φ = 14568336.

The previous prime is 16996363. The next prime is 16996403. The reversal of 16996399 is 99369961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99369961 = 101 ⋅983861.

It is a cyclic number.

It is not a de Polignac number, because 16996399 - 2⁹ = 16995887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16996319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214022 + ... + 1214035.

It is an arithmetic number, because the mean of its divisors is an integer number (4856116).

Almost surely, 2^16996399 is an apocalyptic number.

16996399 is a deficient number, since it is larger than the sum of its proper divisors (2428065).

16996399 is an equidigital number, since it uses as much as digits as its factorization.

16996399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428064.

The product of its digits is 708588, while the sum is 52.

The square root of 16996399 is about 4122.6689170973. The cubic root of 16996399 is about 257.1100025190.

The spelling of 16996399 in words is "sixteen million, nine hundred ninety-six thousand, three hundred ninety-nine".