6463909 has 2 divisors, whose sum is σ = 6463910. Its totient is φ = 6463908.

The previous prime is 6463907. The next prime is 6463949. The reversal of 6463909 is 9093646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5987809 + 476100 = 2447^2 + 690^2 .

It is a cyclic number.

It is not a de Polignac number, because 6463909 - 2¹ = 6463907 is a prime.

Together with 6463907, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 6⁴ + 4² + 6⁸ + 3 + 9 + 0 + 9⁷ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6463901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3231954 + 3231955.

It is an arithmetic number, because the mean of its divisors is an integer number (3231955).

Almost surely, 2^6463909 is an apocalyptic number.

It is an amenable number.

6463909 is a deficient number, since it is larger than the sum of its proper divisors (1).

6463909 is an equidigital number, since it uses as much as digits as its factorization.

6463909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 6463909 is about 2542.4218768725. The cubic root of 6463909 is about 186.2795061582.

The spelling of 6463909 in words is "six million, four hundred sixty-three thousand, nine hundred nine".