820039463 has 2 divisors, whose sum is σ = 820039464. Its totient is φ = 820039462.

The previous prime is 820039459. The next prime is 820039477. The reversal of 820039463 is 364930028.

It is a happy number.

820039463 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 820039463 - 2² = 820039459 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820039403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410019731 + 410019732.

It is an arithmetic number, because the mean of its divisors is an integer number (410019732).

Almost surely, 2^820039463 is an apocalyptic number.

820039463 is a deficient number, since it is larger than the sum of its proper divisors (1).

820039463 is an equidigital number, since it uses as much as digits as its factorization.

820039463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 820039463 is about 28636.3311721317. The cubic root of 820039463 is about 936.0051771057.

The spelling of 820039463 in words is "eight hundred twenty million, thirty-nine thousand, four hundred sixty-three".