16449819 has 4 divisors (see below), whose sum is σ = 21933096. Its totient is φ = 10966544.

The previous prime is 16449817. The next prime is 16449827. The reversal of 16449819 is 91894461.

16449819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91894461 = 3 ⋅30631487.

It is a cyclic number.

It is not a de Polignac number, because 16449819 - 2¹ = 16449817 is a prime.

It is a super-2 number, since 2×16449819² = 541193090265522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16449817) 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, 2741634 + ... + 2741639.

It is an arithmetic number, because the mean of its divisors is an integer number (5483274).

Almost surely, 2^16449819 is an apocalyptic number.

16449819 is a deficient number, since it is larger than the sum of its proper divisors (5483277).

16449819 is an equidigital number, since it uses as much as digits as its factorization.

16449819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5483276.

The product of its digits is 62208, while the sum is 42.

The square root of 16449819 is about 4055.8376446796. The cubic root of 16449819 is about 254.3238218028.

The spelling of 16449819 in words is "sixteen million, four hundred forty-nine thousand, eight hundred nineteen".