820597223 has 2 divisors, whose sum is σ = 820597224. Its totient is φ = 820597222.

The previous prime is 820597199. The next prime is 820597277. The reversal of 820597223 is 322795028.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 820597223 - 2⁶ = 820597159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820597523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410298611 + 410298612.

It is an arithmetic number, because the mean of its divisors is an integer number (410298612).

Almost surely, 2^820597223 is an apocalyptic number.

820597223 is a deficient number, since it is larger than the sum of its proper divisors (1).

820597223 is an equidigital number, since it uses as much as digits as its factorization.

820597223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 820597223 is about 28646.0681944312. The cubic root of 820597223 is about 936.2173408501.

The spelling of 820597223 in words is "eight hundred twenty million, five hundred ninety-seven thousand, two hundred twenty-three".