6469 has 2 divisors, whose sum is σ = 6470. Its totient is φ = 6468.

The previous prime is 6451. The next prime is 6473. The reversal of 6469 is 9646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3969 + 2500 = 63^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 6469 - 2¹¹ = 4421 is a prime.

It is a super-2 number, since 2×6469² = 83695922, which contains 22 as substring.

It is a nialpdrome in base 9.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3234 + 3235.

It is an arithmetic number, because the mean of its divisors is an integer number (3235).

2⁶⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

6469 is a deficient number, since it is larger than the sum of its proper divisors (1).

6469 is an equidigital number, since it uses as much as digits as its factorization.

6469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 6469 is about 80.4300938704. The cubic root of 6469 is about 18.6328398147.

The spelling of 6469 in words is "six thousand, four hundred sixty-nine".