16539539 has 2 divisors, whose sum is σ = 16539540. Its totient is φ = 16539538.

The previous prime is 16539533. The next prime is 16539547. The reversal of 16539539 is 93593561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16539539 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16539496 and 16539505.

It is not a weakly prime, because it can be changed into another prime (16539533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8269769 + 8269770.

It is an arithmetic number, because the mean of its divisors is an integer number (8269770).

Almost surely, 2^16539539 is an apocalyptic number.

16539539 is a deficient number, since it is larger than the sum of its proper divisors (1).

16539539 is an equidigital number, since it uses as much as digits as its factorization.

16539539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109350, while the sum is 41.

The square root of 16539539 is about 4066.8832046175. The cubic root of 16539539 is about 254.7853582751.

The spelling of 16539539 in words is "sixteen million, five hundred thirty-nine thousand, five hundred thirty-nine".