16421199 has 4 divisors (see below), whose sum is σ = 21894936. Its totient is φ = 10947464.

The previous prime is 16421191. The next prime is 16421203. The reversal of 16421199 is 99112461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16421199 - 2³ = 16421191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2736864 + ... + 2736869.

It is an arithmetic number, because the mean of its divisors is an integer number (5473734).

Almost surely, 2^16421199 is an apocalyptic number.

16421199 is a deficient number, since it is larger than the sum of its proper divisors (5473737).

16421199 is an equidigital number, since it uses as much as digits as its factorization.

16421199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5473736.

The product of its digits is 3888, while the sum is 33.

The square root of 16421199 is about 4052.3078609602. The cubic root of 16421199 is about 254.1762422025.

The spelling of 16421199 in words is "sixteen million, four hundred twenty-one thousand, one hundred ninety-nine".