16401169 has 2 divisors, whose sum is σ = 16401170. Its totient is φ = 16401168.

The previous prime is 16401163. The next prime is 16401173. The reversal of 16401169 is 96110461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15904144 + 497025 = 3988^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 16401169 - 2⁵ = 16401137 is a prime.

It is a super-2 number, since 2×16401169² = 537996689133122, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (16401163) 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, 8200584 + 8200585.

It is an arithmetic number, because the mean of its divisors is an integer number (8200585).

Almost surely, 2^16401169 is an apocalyptic number.

It is an amenable number.

16401169 is a deficient number, since it is larger than the sum of its proper divisors (1).

16401169 is an equidigital number, since it uses as much as digits as its factorization.

16401169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 16401169 is about 4049.8356756787. The cubic root of 16401169 is about 254.0728550800.

It can be divided in two parts, 1640 and 1169, that added together give a square (2809 = 53²).

The spelling of 16401169 in words is "sixteen million, four hundred one thousand, one hundred sixty-nine".