16398443 has 2 divisors, whose sum is σ = 16398444. Its totient is φ = 16398442.

The previous prime is 16398433. The next prime is 16398457. The reversal of 16398443 is 34489361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16398443 - 2¹⁸ = 16136299 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 16398397 and 16398406.

It is not a weakly prime, because it can be changed into another prime (16398413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8199221 + 8199222.

It is an arithmetic number, because the mean of its divisors is an integer number (8199222).

Almost surely, 2^16398443 is an apocalyptic number.

16398443 is a deficient number, since it is larger than the sum of its proper divisors (1).

16398443 is an equidigital number, since it uses as much as digits as its factorization.

16398443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 16398443 is about 4049.4991048277. The cubic root of 16398443 is about 254.0587780147.

The spelling of 16398443 in words is "sixteen million, three hundred ninety-eight thousand, four hundred forty-three".