6463381 has 2 divisors, whose sum is σ = 6463382. Its totient is φ = 6463380.

The previous prime is 6463337. The next prime is 6463399. The reversal of 6463381 is 1833646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6275025 + 188356 = 2505^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 6463381 - 2¹¹ = 6461333 is a prime.

It is a super-2 number, since 2×6463381² = 83550587902322, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6² + 4 + 6⁸ + 3⁵ + 3¹⁴ + 8³ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6463081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3231690 + 3231691.

It is an arithmetic number, because the mean of its divisors is an integer number (3231691).

Almost surely, 2^6463381 is an apocalyptic number.

It is an amenable number.

6463381 is a deficient number, since it is larger than the sum of its proper divisors (1).

6463381 is an equidigital number, since it uses as much as digits as its factorization.

6463381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 6463381 is about 2542.3180367531. The cubic root of 6463381 is about 186.2744339819.

The spelling of 6463381 in words is "six million, four hundred sixty-three thousand, three hundred eighty-one".