16444387 has 2 divisors, whose sum is σ = 16444388. Its totient is φ = 16444386.

The previous prime is 16444369. The next prime is 16444399. The reversal of 16444387 is 78344461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16444387 - 2²³ = 8055779 is a prime.

It is not a weakly prime, because it can be changed into another prime (16444487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8222193 + 8222194.

It is an arithmetic number, because the mean of its divisors is an integer number (8222194).

Almost surely, 2^16444387 is an apocalyptic number.

16444387 is a deficient number, since it is larger than the sum of its proper divisors (1).

16444387 is an equidigital number, since it uses as much as digits as its factorization.

16444387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The square root of 16444387 is about 4055.1679373363. The cubic root of 16444387 is about 254.2958247554.

It can be divided in two parts, 164 and 44387, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 16444387 in words is "sixteen million, four hundred forty-four thousand, three hundred eighty-seven".