16042309 has 2 divisors, whose sum is σ = 16042310. Its totient is φ = 16042308.

The previous prime is 16042303. The next prime is 16042319. The reversal of 16042309 is 90324061.

16042309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9941409 + 6100900 = 3153^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 16042309 - 2⁹ = 16041797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16042303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8021154 + 8021155.

It is an arithmetic number, because the mean of its divisors is an integer number (8021155).

Almost surely, 2^16042309 is an apocalyptic number.

It is an amenable number.

16042309 is a deficient number, since it is larger than the sum of its proper divisors (1).

16042309 is an equidigital number, since it uses as much as digits as its factorization.

16042309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 16042309 is about 4005.2851334206. The cubic root of 16042309 is about 252.2061228235.

The spelling of 16042309 in words is "sixteen million, forty-two thousand, three hundred nine".