195447953 has 2 divisors, whose sum is σ = 195447954. Its totient is φ = 195447952.

The previous prime is 195447881. The next prime is 195447979. The reversal of 195447953 is 359744591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188567824 + 6880129 = 13732^2 + 2623^2 .

It is a cyclic number.

It is not a de Polignac number, because 195447953 - 2¹⁶ = 195382417 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 195447898 and 195447907.

It is not a weakly prime, because it can be changed into another prime (195347953) 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, 97723976 + 97723977.

It is an arithmetic number, because the mean of its divisors is an integer number (97723977).

Almost surely, 2^195447953 is an apocalyptic number.

It is an amenable number.

195447953 is a deficient number, since it is larger than the sum of its proper divisors (1).

195447953 is an equidigital number, since it uses as much as digits as its factorization.

195447953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 47.

The square root of 195447953 is about 13980.2701332986. The cubic root of 195447953 is about 580.3326995287.

The spelling of 195447953 in words is "one hundred ninety-five million, four hundred forty-seven thousand, nine hundred fifty-three".