16021339 has 2 divisors, whose sum is σ = 16021340. Its totient is φ = 16021338.

The previous prime is 16021331. The next prime is 16021367. The reversal of 16021339 is 93312061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16021339 - 2³ = 16021331 is a prime.

It is not a weakly prime, because it can be changed into another prime (16021331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8010669 + 8010670.

It is an arithmetic number, because the mean of its divisors is an integer number (8010670).

Almost surely, 2^16021339 is an apocalyptic number.

16021339 is a deficient number, since it is larger than the sum of its proper divisors (1).

16021339 is an equidigital number, since it uses as much as digits as its factorization.

16021339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 16021339 is about 4002.6664862314. Note that the first 3 decimals coincide. The cubic root of 16021339 is about 252.0961829451.

The spelling of 16021339 in words is "sixteen million, twenty-one thousand, three hundred thirty-nine".