820726983 has 12 divisors (see below), whose sum is σ = 1247889240. Its totient is φ = 518353776.

The previous prime is 820726979. The next prime is 820726987. The reversal of 820726983 is 389627028.

It is an interprime number because it is at equal distance from previous prime (820726979) and next prime (820726987).

It is not a de Polignac number, because 820726983 - 2² = 820726979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820726987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2399616 + ... + 2399957.

It is an arithmetic number, because the mean of its divisors is an integer number (103990770).

Almost surely, 2^820726983 is an apocalyptic number.

820726983 is a deficient number, since it is larger than the sum of its proper divisors (427162257).

820726983 is a wasteful number, since it uses less digits than its factorization.

820726983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4799598 (or 4799595 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 820726983 is about 28648.3329881513. The cubic root of 820726983 is about 936.2666858701.

Adding to 820726983 its sum of digits (45), we get a palindrome (820727028).

The spelling of 820726983 in words is "eight hundred twenty million, seven hundred twenty-six thousand, nine hundred eighty-three".