16432289 has 2 divisors, whose sum is σ = 16432290. Its totient is φ = 16432288.

The previous prime is 16432277. The next prime is 16432291. The reversal of 16432289 is 98223461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8952064 + 7480225 = 2992^2 + 2735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16432289 is a prime.

Together with 16432291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16432249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8216144 + 8216145.

It is an arithmetic number, because the mean of its divisors is an integer number (8216145).

Almost surely, 2^16432289 is an apocalyptic number.

It is an amenable number.

16432289 is a deficient number, since it is larger than the sum of its proper divisors (1).

16432289 is an equidigital number, since it uses as much as digits as its factorization.

16432289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 16432289 is about 4053.6759860650. The cubic root of 16432289 is about 254.2334483420.

The spelling of 16432289 in words is "sixteen million, four hundred thirty-two thousand, two hundred eighty-nine".