16257889 has 2 divisors, whose sum is σ = 16257890. Its totient is φ = 16257888.

The previous prime is 16257883. The next prime is 16257907. The reversal of 16257889 is 98875261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12723489 + 3534400 = 3567^2 + 1880^2 .

It is an emirp because it is prime and its reverse (98875261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16257889 - 2³ = 16257881 is a prime.

It is not a weakly prime, because it can be changed into another prime (16257881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8128944 + 8128945.

It is an arithmetic number, because the mean of its divisors is an integer number (8128945).

Almost surely, 2^16257889 is an apocalyptic number.

It is an amenable number.

16257889 is a deficient number, since it is larger than the sum of its proper divisors (1).

16257889 is an equidigital number, since it uses as much as digits as its factorization.

16257889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The square root of 16257889 is about 4032.1072654383. The cubic root of 16257889 is about 253.3308331163.

The spelling of 16257889 in words is "sixteen million, two hundred fifty-seven thousand, eight hundred eighty-nine".