195280123 has 2 divisors, whose sum is σ = 195280124. Its totient is φ = 195280122.

The previous prime is 195280121. The next prime is 195280133. The reversal of 195280123 is 321082591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195280123 - 2¹ = 195280121 is a prime.

Together with 195280121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (195280121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97640061 + 97640062.

It is an arithmetic number, because the mean of its divisors is an integer number (97640062).

Almost surely, 2^195280123 is an apocalyptic number.

195280123 is a deficient number, since it is larger than the sum of its proper divisors (1).

195280123 is an equidigital number, since it uses as much as digits as its factorization.

195280123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 195280123 is about 13974.2664565980. The cubic root of 195280123 is about 580.1665425426.

The spelling of 195280123 in words is "one hundred ninety-five million, two hundred eighty thousand, one hundred twenty-three".