16317493 has 2 divisors, whose sum is σ = 16317494. Its totient is φ = 16317492.

The previous prime is 16317479. The next prime is 16317503. The reversal of 16317493 is 39471361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12229009 + 4088484 = 3497^2 + 2022^2 .

It is an emirp because it is prime and its reverse (39471361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16317493 - 2¹⁷ = 16186421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16317443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8158746 + 8158747.

It is an arithmetic number, because the mean of its divisors is an integer number (8158747).

Almost surely, 2^16317493 is an apocalyptic number.

It is an amenable number.

16317493 is a deficient number, since it is larger than the sum of its proper divisors (1).

16317493 is an equidigital number, since it uses as much as digits as its factorization.

16317493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 16317493 is about 4039.4916759414. The cubic root of 16317493 is about 253.6400392304.

The spelling of 16317493 in words is "sixteen million, three hundred seventeen thousand, four hundred ninety-three".