16443397 has 2 divisors, whose sum is σ = 16443398. Its totient is φ = 16443396.

The previous prime is 16443391. The next prime is 16443431. The reversal of 16443397 is 79334461.

16443397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15374241 + 1069156 = 3921^2 + 1034^2 .

It is a cyclic number.

It is not a de Polignac number, because 16443397 - 2⁷ = 16443269 is a prime.

It is a super-3 number, since 3×16443397³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16443391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221698 + 8221699.

It is an arithmetic number, because the mean of its divisors is an integer number (8221699).

Almost surely, 2^16443397 is an apocalyptic number.

It is an amenable number.

16443397 is a deficient number, since it is larger than the sum of its proper divisors (1).

16443397 is an equidigital number, since it uses as much as digits as its factorization.

16443397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 37.

The square root of 16443397 is about 4055.0458690377. The cubic root of 16443397 is about 254.2907215365.

It can be divided in two parts, 1644 and 3397, that added together give a square (5041 = 71²).

The spelling of 16443397 in words is "sixteen million, four hundred forty-three thousand, three hundred ninety-seven".