821463263 has 4 divisors (see below), whose sum is σ = 821979240. Its totient is φ = 820947288.

The previous prime is 821463259. The next prime is 821463277. The reversal of 821463263 is 362364128.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 821463263 - 2² = 821463259 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 (821463283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255593 + ... + 258786.

It is an arithmetic number, because the mean of its divisors is an integer number (205494810).

Almost surely, 2^821463263 is an apocalyptic number.

821463263 is a deficient number, since it is larger than the sum of its proper divisors (515977).

821463263 is a wasteful number, since it uses less digits than its factorization.

821463263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515976.

The product of its digits is 41472, while the sum is 35.

The square root of 821463263 is about 28661.1804188174. The cubic root of 821463263 is about 936.5465793511.

The spelling of 821463263 in words is "eight hundred twenty-one million, four hundred sixty-three thousand, two hundred sixty-three".