820463 has 4 divisors (see below), whose sum is σ = 937680. Its totient is φ = 703248.

The previous prime is 820459. The next prime is 820481. The reversal of 820463 is 364028.

It is a happy number.

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

It is not a de Polignac number, because 820463 - 2² = 820459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 820463.

It is not an unprimeable number, because it can be changed into a prime (820163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58598 + ... + 58611.

It is an arithmetic number, because the mean of its divisors is an integer number (234420).

2⁸²⁰⁴⁶³ is an apocalyptic number.

820463 is a deficient number, since it is larger than the sum of its proper divisors (117217).

820463 is a wasteful number, since it uses less digits than its factorization.

820463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117216.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 820463 is about 905.7941267198. The cubic root of 820463 is about 93.6166293171.

The spelling of 820463 in words is "eight hundred twenty thousand, four hundred sixty-three".