16908393 has 4 divisors (see below), whose sum is σ = 22544528. Its totient is φ = 11272260.

The previous prime is 16908383. The next prime is 16908443. The reversal of 16908393 is 39380961.

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.

It is not a de Polignac number, because 16908393 - 2⁶ = 16908329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16908323) 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, 2818063 + ... + 2818068.

It is an arithmetic number, because the mean of its divisors is an integer number (5636132).

Almost surely, 2^16908393 is an apocalyptic number.

It is an amenable number.

16908393 is a deficient number, since it is larger than the sum of its proper divisors (5636135).

16908393 is an equidigital number, since it uses as much as digits as its factorization.

16908393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636134.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 16908393 is about 4111.9816390641. The cubic root of 16908393 is about 256.6654693447.

The spelling of 16908393 in words is "sixteen million, nine hundred eight thousand, three hundred ninety-three".