195323881 has 2 divisors, whose sum is σ = 195323882. Its totient is φ = 195323880.

The previous prime is 195323833. The next prime is 195323917. The reversal of 195323881 is 188323591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181818256 + 13505625 = 13484^2 + 3675^2 .

It is a cyclic number.

It is not a de Polignac number, because 195323881 - 2⁷ = 195323753 is a prime.

It is a super-2 number, since 2×195323881² = 76302836977804322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (195324881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97661940 + 97661941.

It is an arithmetic number, because the mean of its divisors is an integer number (97661941).

Almost surely, 2^195323881 is an apocalyptic number.

It is an amenable number.

195323881 is a deficient number, since it is larger than the sum of its proper divisors (1).

195323881 is an equidigital number, since it uses as much as digits as its factorization.

195323881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 195323881 is about 13975.8320324766. The cubic root of 195323881 is about 580.2098735128.

The spelling of 195323881 in words is "one hundred ninety-five million, three hundred twenty-three thousand, eight hundred eighty-one".