16909351 has 4 divisors (see below), whose sum is σ = 16943472. Its totient is φ = 16875232.

The previous prime is 16909337. The next prime is 16909367. The reversal of 16909351 is 15390961.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16909351 - 2²¹ = 14812199 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 (16909391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16306 + ... + 17311.

It is an arithmetic number, because the mean of its divisors is an integer number (4235868).

Almost surely, 2^16909351 is an apocalyptic number.

16909351 is a deficient number, since it is larger than the sum of its proper divisors (34121).

16909351 is an equidigital number, since it uses as much as digits as its factorization.

16909351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34120.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 16909351 is about 4112.0981262611. The cubic root of 16909351 is about 256.6703166588.

The spelling of 16909351 in words is "sixteen million, nine hundred nine thousand, three hundred fifty-one".