16091869 has 2 divisors, whose sum is σ = 16091870. Its totient is φ = 16091868.

The previous prime is 16091857. The next prime is 16091899. The reversal of 16091869 is 96819061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12687844 + 3404025 = 3562^2 + 1845^2 .

It is an emirp because it is prime and its reverse (96819061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16091869 - 2⁹ = 16091357 is a prime.

It is a super-2 number, since 2×16091869² = 517896495826322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16091899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8045934 + 8045935.

It is an arithmetic number, because the mean of its divisors is an integer number (8045935).

Almost surely, 2^16091869 is an apocalyptic number.

It is an amenable number.

16091869 is a deficient number, since it is larger than the sum of its proper divisors (1).

16091869 is an equidigital number, since it uses as much as digits as its factorization.

16091869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 16091869 is about 4011.4671879501. The cubic root of 16091869 is about 252.4655718834.

It can be divided in two parts, 160 and 91869, that added together give a palindrome (92029).

The spelling of 16091869 in words is "sixteen million, ninety-one thousand, eight hundred sixty-nine".