16004459 has 2 divisors, whose sum is σ = 16004460. Its totient is φ = 16004458.

The previous prime is 16004453. The next prime is 16004489. The reversal of 16004459 is 95440061.

It is a weak prime.

It is an emirp because it is prime and its reverse (95440061) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16004459 is a prime.

It is a super-2 number, since 2×16004459² = 512285415765362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16004453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8002229 + 8002230.

It is an arithmetic number, because the mean of its divisors is an integer number (8002230).

Almost surely, 2^16004459 is an apocalyptic number.

16004459 is a deficient number, since it is larger than the sum of its proper divisors (1).

16004459 is an equidigital number, since it uses as much as digits as its factorization.

16004459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 16004459 is about 4000.5573361720. The cubic root of 16004459 is about 252.0076160880.

The spelling of 16004459 in words is "sixteen million, four thousand, four hundred fifty-nine".