16317391 has 2 divisors, whose sum is σ = 16317392. Its totient is φ = 16317390.

The previous prime is 16317361. The next prime is 16317421. The reversal of 16317391 is 19371361.

It is a balanced prime because it is at equal distance from previous prime (16317361) and next prime (16317421).

It is a cyclic number.

It is not a de Polignac number, because 16317391 - 2¹³ = 16309199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16317311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8158695 + 8158696.

It is an arithmetic number, because the mean of its divisors is an integer number (8158696).

Almost surely, 2^16317391 is an apocalyptic number.

16317391 is a deficient number, since it is larger than the sum of its proper divisors (1).

16317391 is an equidigital number, since it uses as much as digits as its factorization.

16317391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 31.

The square root of 16317391 is about 4039.4790505708. The cubic root of 16317391 is about 253.6395107314.

The spelling of 16317391 in words is "sixteen million, three hundred seventeen thousand, three hundred ninety-one".