16539433 has 2 divisors, whose sum is σ = 16539434. Its totient is φ = 16539432.

The previous prime is 16539427. The next prime is 16539437. The reversal of 16539433 is 33493561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16297369 + 242064 = 4037^2 + 492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16539433 is a prime.

It is a super-2 number, since 2×16539433² = 547105687922978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16539437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8269716 + 8269717.

It is an arithmetic number, because the mean of its divisors is an integer number (8269717).

Almost surely, 2^16539433 is an apocalyptic number.

It is an amenable number.

16539433 is a deficient number, since it is larger than the sum of its proper divisors (1).

16539433 is an equidigital number, since it uses as much as digits as its factorization.

16539433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 34.

The square root of 16539433 is about 4066.8701725037. The cubic root of 16539433 is about 254.7848139773.

The spelling of 16539433 in words is "sixteen million, five hundred thirty-nine thousand, four hundred thirty-three".