820485475 has 12 divisors (see below), whose sum is σ = 1020431464. Its totient is φ = 654433920.

The previous prime is 820485473. The next prime is 820485499. The reversal of 820485475 is 574584028.

It is a happy number.

It is not a de Polignac number, because 820485475 - 2¹ = 820485473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820485473) 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 11 ways as a sum of consecutive naturals, for example, 40269 + ... + 57118.

Almost surely, 2^820485475 is an apocalyptic number.

820485475 is a deficient number, since it is larger than the sum of its proper divisors (199945989).

820485475 is a wasteful number, since it uses less digits than its factorization.

820485475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97734 (or 97729 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 43.

The square root of 820485475 is about 28644.1176334688. The cubic root of 820485475 is about 936.1748412486.

The spelling of 820485475 in words is "eight hundred twenty million, four hundred eighty-five thousand, four hundred seventy-five".