16724399 has 2 divisors, whose sum is σ = 16724400. Its totient is φ = 16724398.

The previous prime is 16724371. The next prime is 16724423. The reversal of 16724399 is 99342761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16724399 - 2¹² = 16720303 is a prime.

It is a super-2 number, since 2×16724399² = 559411043822402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16724599) 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 as a sum of consecutive naturals, namely, 8362199 + 8362200.

It is an arithmetic number, because the mean of its divisors is an integer number (8362200).

Almost surely, 2^16724399 is an apocalyptic number.

16724399 is a deficient number, since it is larger than the sum of its proper divisors (1).

16724399 is an equidigital number, since it uses as much as digits as its factorization.

16724399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 16724399 is about 4089.5475299842. The cubic root of 16724399 is about 255.7310764454.

The spelling of 16724399 in words is "sixteen million, seven hundred twenty-four thousand, three hundred ninety-nine".