195959957 has 2 divisors, whose sum is σ = 195959958. Its totient is φ = 195959956.

The previous prime is 195959941. The next prime is 195959963. The reversal of 195959957 is 759959591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169806961 + 26152996 = 13031^2 + 5114^2 .

It is a cyclic number.

It is not a de Polignac number, because 195959957 - 2⁴ = 195959941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195959896 and 195959905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195958957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97979978 + 97979979.

It is an arithmetic number, because the mean of its divisors is an integer number (97979979).

Almost surely, 2^195959957 is an apocalyptic number.

It is an amenable number.

195959957 is a deficient number, since it is larger than the sum of its proper divisors (1).

195959957 is an equidigital number, since it uses as much as digits as its factorization.

195959957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5740875, while the sum is 59.

The square root of 195959957 is about 13998.5698198066. The cubic root of 195959957 is about 580.8390126337.

It can be divided in two parts, 1959 and 59957, that added together give a palindrome (61916).

The spelling of 195959957 in words is "one hundred ninety-five million, nine hundred fifty-nine thousand, nine hundred fifty-seven".