16400539 has 2 divisors, whose sum is σ = 16400540. Its totient is φ = 16400538.

The previous prime is 16400513. The next prime is 16400567. The reversal of 16400539 is 93500461.

16400539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (16400567) can be obtained adding 16400539 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16400539 - 2⁷ = 16400411 is a prime.

It is not a weakly prime, because it can be changed into another prime (16400939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8200269 + 8200270.

It is an arithmetic number, because the mean of its divisors is an integer number (8200270).

Almost surely, 2^16400539 is an apocalyptic number.

16400539 is a deficient number, since it is larger than the sum of its proper divisors (1).

16400539 is an equidigital number, since it uses as much as digits as its factorization.

16400539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 16400539 is about 4049.7578939981. The cubic root of 16400539 is about 254.0696018983.

The spelling of 16400539 in words is "sixteen million, four hundred thousand, five hundred thirty-nine".