16042909 has 2 divisors, whose sum is σ = 16042910. Its totient is φ = 16042908.

The previous prime is 16042907. The next prime is 16042919. The reversal of 16042909 is 90924061.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14784025 + 1258884 = 3845^2 + 1122^2 .

It is an emirp because it is prime and its reverse (90924061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16042909 - 2¹ = 16042907 is a prime.

Together with 16042907, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16042907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8021454 + 8021455.

It is an arithmetic number, because the mean of its divisors is an integer number (8021455).

Almost surely, 2^16042909 is an apocalyptic number.

It is an amenable number.

16042909 is a deficient number, since it is larger than the sum of its proper divisors (1).

16042909 is an equidigital number, since it uses as much as digits as its factorization.

16042909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 16042909 is about 4005.3600337548. The cubic root of 16042909 is about 252.2092670465.

The spelling of 16042909 in words is "sixteen million, forty-two thousand, nine hundred nine".