16442399 has 2 divisors, whose sum is σ = 16442400. Its totient is φ = 16442398.

The previous prime is 16442381. The next prime is 16442407. The reversal of 16442399 is 99324461.

It is a strong prime.

It is an emirp because it is prime and its reverse (99324461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16442399 - 2⁸ = 16442143 is a prime.

It is a super-3 number, since 3×16442399³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16442359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221199 + 8221200.

It is an arithmetic number, because the mean of its divisors is an integer number (8221200).

Almost surely, 2^16442399 is an apocalyptic number.

16442399 is a deficient number, since it is larger than the sum of its proper divisors (1).

16442399 is an equidigital number, since it uses as much as digits as its factorization.

16442399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 16442399 is about 4054.9228106093. The cubic root of 16442399 is about 254.2855768721.

The spelling of 16442399 in words is "sixteen million, four hundred forty-two thousand, three hundred ninety-nine".