820484893 has 4 divisors (see below), whose sum is σ = 820946848. Its totient is φ = 820022940.

The previous prime is 820484869. The next prime is 820484927. The reversal of 820484893 is 398484028.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 820484893 - 2⁹ = 820484381 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 (820484813) 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, 228303 + ... + 231868.

It is an arithmetic number, because the mean of its divisors is an integer number (205236712).

Almost surely, 2^820484893 is an apocalyptic number.

It is an amenable number.

820484893 is a deficient number, since it is larger than the sum of its proper divisors (461955).

820484893 is a wasteful number, since it uses less digits than its factorization.

820484893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461954.

The product of its (nonzero) digits is 442368, while the sum is 46.

The square root of 820484893 is about 28644.1074743131. The cubic root of 820484893 is about 936.1746198943.

The spelling of 820484893 in words is "eight hundred twenty million, four hundred eighty-four thousand, eight hundred ninety-three".