16423849 has 4 divisors (see below), whose sum is σ = 17687236. Its totient is φ = 15160464.

The previous prime is 16423829. The next prime is 16423859. The reversal of 16423849 is 94832461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94832461 = 5563 ⋅17047.

It can be written as a sum of positive squares in 2 ways, for example, as 10445824 + 5978025 = 3232^2 + 2445^2 .

It is a cyclic number.

It is not a de Polignac number, because 16423849 - 2¹⁷ = 16292777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16423829) 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, 631674 + ... + 631699.

It is an arithmetic number, because the mean of its divisors is an integer number (4421809).

Almost surely, 2^16423849 is an apocalyptic number.

It is an amenable number.

16423849 is a deficient number, since it is larger than the sum of its proper divisors (1263387).

16423849 is a wasteful number, since it uses less digits than its factorization.

16423849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263386.

The product of its digits is 41472, while the sum is 37.

The square root of 16423849 is about 4052.6348219399. The cubic root of 16423849 is about 254.1899141804.

The spelling of 16423849 in words is "sixteen million, four hundred twenty-three thousand, eight hundred forty-nine".