16423489 has 2 divisors, whose sum is σ = 16423490. Its totient is φ = 16423488.

The previous prime is 16423487. The next prime is 16423499. The reversal of 16423489 is 98432461.

16423489 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., 9090225 + 7333264 = 3015^2 + 2708^2 .

It is a cyclic number.

It is not a de Polignac number, because 16423489 - 2¹ = 16423487 is a prime.

Together with 16423487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16423487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8211744 + 8211745.

It is an arithmetic number, because the mean of its divisors is an integer number (8211745).

Almost surely, 2^16423489 is an apocalyptic number.

It is an amenable number.

16423489 is a deficient number, since it is larger than the sum of its proper divisors (1).

16423489 is an equidigital number, since it uses as much as digits as its factorization.

16423489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 16423489 is about 4052.5904061477. The cubic root of 16423489 is about 254.1880569415.

It can be divided in two parts, 164 and 23489, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 16423489 in words is "sixteen million, four hundred twenty-three thousand, four hundred eighty-nine".