16426289 has 4 divisors (see below), whose sum is σ = 17919600. Its totient is φ = 14932980.

The previous prime is 16426283. The next prime is 16426297. The reversal of 16426289 is 98262461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98262461 = 11 ⋅8932951.

It is a cyclic number.

It is not a de Polignac number, because 16426289 - 2⁴ = 16426273 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16426283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746639 + ... + 746660.

It is an arithmetic number, because the mean of its divisors is an integer number (4479900).

Almost surely, 2^16426289 is an apocalyptic number.

It is an amenable number.

16426289 is a deficient number, since it is larger than the sum of its proper divisors (1493311).

16426289 is a wasteful number, since it uses less digits than its factorization.

16426289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493310.

The product of its digits is 41472, while the sum is 38.

The square root of 16426289 is about 4052.9358494800. The cubic root of 16426289 is about 254.2025014182.

The spelling of 16426289 in words is "sixteen million, four hundred twenty-six thousand, two hundred eighty-nine".