16271399 has 4 divisors (see below), whose sum is σ = 16292040. Its totient is φ = 16250760.

The previous prime is 16271347. The next prime is 16271443. The reversal of 16271399 is 99317261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99317261 = 1031 ⋅96331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16271399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16271309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9089 + ... + 10730.

It is an arithmetic number, because the mean of its divisors is an integer number (4073010).

Almost surely, 2^16271399 is an apocalyptic number.

16271399 is a deficient number, since it is larger than the sum of its proper divisors (20641).

16271399 is an equidigital number, since it uses as much as digits as its factorization.

16271399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20640.

The product of its digits is 20412, while the sum is 38.

The square root of 16271399 is about 4033.7822201998. The cubic root of 16271399 is about 253.4009847410.

The spelling of 16271399 in words is "sixteen million, two hundred seventy-one thousand, three hundred ninety-nine".