16793409 has 4 divisors (see below), whose sum is σ = 22391216. Its totient is φ = 11195604.

The previous prime is 16793363. The next prime is 16793419. The reversal of 16793409 is 90439761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90439761 = 3 ⋅30146587.

It is not a de Polignac number, because 16793409 - 2⁷ = 16793281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16793419) 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, 2798899 + ... + 2798904.

It is an arithmetic number, because the mean of its divisors is an integer number (5597804).

Almost surely, 2^16793409 is an apocalyptic number.

It is an amenable number.

16793409 is a deficient number, since it is larger than the sum of its proper divisors (5597807).

16793409 is an equidigital number, since it uses as much as digits as its factorization.

16793409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5597806.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 16793409 is about 4097.9762078372. The cubic root of 16793409 is about 256.0823353733.

The spelling of 16793409 in words is "sixteen million, seven hundred ninety-three thousand, four hundred nine".