6463391 has 16 divisors (see below), whose sum is σ = 7499520. Its totient is φ = 5512320.

The previous prime is 6463381. The next prime is 6463399. The reversal of 6463391 is 1933646.

It is a happy number.

It is not a de Polignac number, because 6463391 - 2¹⁰ = 6462367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6463399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14711 + ... + 15143.

It is an arithmetic number, because the mean of its divisors is an integer number (468720).

Almost surely, 2^6463391 is an apocalyptic number.

6463391 is a deficient number, since it is larger than the sum of its proper divisors (1036129).

6463391 is a wasteful number, since it uses less digits than its factorization.

6463391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

The product of its digits is 11664, while the sum is 32.

The square root of 6463391 is about 2542.3200034614. The cubic root of 6463391 is about 186.2745300484.

The spelling of 6463391 in words is "six million, four hundred sixty-three thousand, three hundred ninety-one".