195958493 has 2 divisors, whose sum is σ = 195958494. Its totient is φ = 195958492.

The previous prime is 195958489. The next prime is 195958519. The reversal of 195958493 is 394859591.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168532324 + 27426169 = 12982^2 + 5237^2 .

It is a cyclic number.

It is not a de Polignac number, because 195958493 - 2² = 195958489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195958403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97979246 + 97979247.

It is an arithmetic number, because the mean of its divisors is an integer number (97979247).

Almost surely, 2^195958493 is an apocalyptic number.

It is an amenable number.

195958493 is a deficient number, since it is larger than the sum of its proper divisors (1).

195958493 is an equidigital number, since it uses as much as digits as its factorization.

195958493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 53.

The square root of 195958493 is about 13998.5175286528. The cubic root of 195958493 is about 580.8375661640.

The spelling of 195958493 in words is "one hundred ninety-five million, nine hundred fifty-eight thousand, four hundred ninety-three".