16538287 has 2 divisors, whose sum is σ = 16538288. Its totient is φ = 16538286.

The previous prime is 16538267. The next prime is 16538299. The reversal of 16538287 is 78283561.

It is a strong prime.

It is an emirp because it is prime and its reverse (78283561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16538287 - 2¹¹ = 16536239 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16538267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8269143 + 8269144.

It is an arithmetic number, because the mean of its divisors is an integer number (8269144).

Almost surely, 2^16538287 is an apocalyptic number.

16538287 is a deficient number, since it is larger than the sum of its proper divisors (1).

16538287 is an equidigital number, since it uses as much as digits as its factorization.

16538287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 16538287 is about 4066.7292754743. The cubic root of 16538287 is about 254.7789292504.

The spelling of 16538287 in words is "sixteen million, five hundred thirty-eight thousand, two hundred eighty-seven".