195123947 has 2 divisors, whose sum is σ = 195123948. Its totient is φ = 195123946.

The previous prime is 195123923. The next prime is 195123983. The reversal of 195123947 is 749321591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195123947 - 2⁶ = 195123883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195123997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97561973 + 97561974.

It is an arithmetic number, because the mean of its divisors is an integer number (97561974).

Almost surely, 2^195123947 is an apocalyptic number.

195123947 is a deficient number, since it is larger than the sum of its proper divisors (1).

195123947 is an equidigital number, since it uses as much as digits as its factorization.

195123947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 195123947 is about 13968.6773532787. The cubic root of 195123947 is about 580.0118378480.

The spelling of 195123947 in words is "one hundred ninety-five million, one hundred twenty-three thousand, nine hundred forty-seven".