820580923 has 2 divisors, whose sum is σ = 820580924. Its totient is φ = 820580922.

The previous prime is 820580921. The next prime is 820580951. The reversal of 820580923 is 329085028.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 820580923 - 2¹ = 820580921 is a prime.

Together with 820580921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (820580921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410290461 + 410290462.

It is an arithmetic number, because the mean of its divisors is an integer number (410290462).

Almost surely, 2^820580923 is an apocalyptic number.

820580923 is a deficient number, since it is larger than the sum of its proper divisors (1).

820580923 is an equidigital number, since it uses as much as digits as its factorization.

820580923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 820580923 is about 28645.7836862600. The cubic root of 820580923 is about 936.2111419325.

The spelling of 820580923 in words is "eight hundred twenty million, five hundred eighty thousand, nine hundred twenty-three".