197558923 has 2 divisors, whose sum is σ = 197558924. Its totient is φ = 197558922.

The previous prime is 197558863. The next prime is 197558953. The reversal of 197558923 is 329855791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197558923 - 2²¹ = 195461771 is a prime.

It is not a weakly prime, because it can be changed into another prime (197558953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98779461 + 98779462.

It is an arithmetic number, because the mean of its divisors is an integer number (98779462).

Almost surely, 2^197558923 is an apocalyptic number.

197558923 is a deficient number, since it is larger than the sum of its proper divisors (1).

197558923 is an equidigital number, since it uses as much as digits as its factorization.

197558923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 49.

The square root of 197558923 is about 14055.5655524778. The cubic root of 197558923 is about 582.4145507597.

The spelling of 197558923 in words is "one hundred ninety-seven million, five hundred fifty-eight thousand, nine hundred twenty-three".