16217399 has 8 divisors (see below), whose sum is σ = 17982480. Its totient is φ = 14500800.

The previous prime is 16217381. The next prime is 16217413. The reversal of 16217399 is 99371261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16217399 - 2⁸ = 16217143 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 (16217329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11414 + ... + 12755.

It is an arithmetic number, because the mean of its divisors is an integer number (2247810).

Almost surely, 2^16217399 is an apocalyptic number.

16217399 is a deficient number, since it is larger than the sum of its proper divisors (1765081).

16217399 is a wasteful number, since it uses less digits than its factorization.

16217399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24241.

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

The square root of 16217399 is about 4027.0831876186. The cubic root of 16217399 is about 253.1203528893.

The spelling of 16217399 in words is "sixteen million, two hundred seventeen thousand, three hundred ninety-nine".