16419889 has 2 divisors, whose sum is σ = 16419890. Its totient is φ = 16419888.

The previous prime is 16419883. The next prime is 16419911. The reversal of 16419889 is 98891461.

16419889 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., 14899600 + 1520289 = 3860^2 + 1233^2 .

It is an emirp because it is prime and its reverse (98891461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16419889 - 2¹⁵ = 16387121 is a prime.

It is a super-2 number, since 2×16419889² = 539225509544642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16419883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8209944 + 8209945.

It is an arithmetic number, because the mean of its divisors is an integer number (8209945).

Almost surely, 2^16419889 is an apocalyptic number.

It is an amenable number.

16419889 is a deficient number, since it is larger than the sum of its proper divisors (1).

16419889 is an equidigital number, since it uses as much as digits as its factorization.

16419889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The square root of 16419889 is about 4052.1462214486. The cubic root of 16419889 is about 254.1694830588.

The spelling of 16419889 in words is "sixteen million, four hundred nineteen thousand, eight hundred eighty-nine".