16439449 has 4 divisors (see below), whose sum is σ = 17704036. Its totient is φ = 15174864.

The previous prime is 16439447. The next prime is 16439461. The reversal of 16439449 is 94493461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94493461 = 127 ⋅744043.

It can be written as a sum of positive squares in 2 ways, for example, as 915849 + 15523600 = 957^2 + 3940^2 .

It is a cyclic number.

It is not a de Polignac number, because 16439449 - 2¹ = 16439447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16439447) 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, 632274 + ... + 632299.

It is an arithmetic number, because the mean of its divisors is an integer number (4426009).

Almost surely, 2^16439449 is an apocalyptic number.

It is an amenable number.

16439449 is a deficient number, since it is larger than the sum of its proper divisors (1264587).

16439449 is a wasteful number, since it uses less digits than its factorization.

16439449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264586.

The product of its digits is 93312, while the sum is 40.

The square root of 16439449 is about 4054.5590389092. The cubic root of 16439449 is about 254.2703684807.

The spelling of 16439449 in words is "sixteen million, four hundred thirty-nine thousand, four hundred forty-nine".