6463651 has 2 divisors, whose sum is σ = 6463652.
Its totient is φ = 6463650.
The previous prime is 6463649. The next prime is 6463661. The reversal of 6463651 is 1563646.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 6463651 - 21 = 6463649 is a prime.
Together with 6463649, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (6463601) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3231825 + 3231826.
It is an arithmetic number, because the mean of its divisors is an integer number (3231826).
Almost surely, 26463651 is an apocalyptic number.
6463651 is a deficient number, since it is larger than the sum of its proper divisors (1).
6463651 is an equidigital number, since it uses as much as digits as its factorization.
6463651 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 12960, while the sum is 31.
The square root of 6463651 is about 2542.3711373440.
The cubic root of 6463651 is about 186.2770277429.
The spelling of 6463651 in words is "six million, four hundred sixty-three thousand, six hundred fifty-one".