6445169 has 2 divisors, whose sum is σ = 6445170. Its totient is φ = 6445168.

The previous prime is 6445151. The next prime is 6445177. The reversal of 6445169 is 9615446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6190144 + 255025 = 2488^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 6445169 - 2²⁰ = 5396593 is a prime.

It is a super-2 number, since 2×6445169² = 83080406877122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6445189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222584 + 3222585.

It is an arithmetic number, because the mean of its divisors is an integer number (3222585).

Almost surely, 2^6445169 is an apocalyptic number.

It is an amenable number.

6445169 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445169 is an equidigital number, since it uses as much as digits as its factorization.

6445169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 6445169 is about 2538.7337394851. The cubic root of 6445169 is about 186.0993129787.

The spelling of 6445169 in words is "six million, four hundred forty-five thousand, one hundred sixty-nine".