820898713 has 4 divisors (see below), whose sum is σ = 820956708. Its totient is φ = 820840720.

The previous prime is 820898699. The next prime is 820898731. The reversal of 820898713 is 317898028.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 162103824 + 658794889 = 12732^2 + 25667^2 .

It is a cyclic number.

It is not a de Polignac number, because 820898713 - 2¹⁷ = 820767641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820898753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7803 + ... + 41263.

It is an arithmetic number, because the mean of its divisors is an integer number (205239177).

Almost surely, 2^820898713 is an apocalyptic number.

It is an amenable number.

820898713 is a deficient number, since it is larger than the sum of its proper divisors (57995).

820898713 is a wasteful number, since it uses less digits than its factorization.

820898713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57994.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 820898713 is about 28651.3300389354. The cubic root of 820898713 is about 936.3319832095.

The spelling of 820898713 in words is "eight hundred twenty million, eight hundred ninety-eight thousand, seven hundred thirteen".