195587983 has 2 divisors, whose sum is σ = 195587984. Its totient is φ = 195587982.

The previous prime is 195587911. The next prime is 195587989. The reversal of 195587983 is 389785591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195587983 - 2⁹ = 195587471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195587989) 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, 97793991 + 97793992.

It is an arithmetic number, because the mean of its divisors is an integer number (97793992).

Almost surely, 2^195587983 is an apocalyptic number.

195587983 is a deficient number, since it is larger than the sum of its proper divisors (1).

195587983 is an equidigital number, since it uses as much as digits as its factorization.

195587983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 55.

The square root of 195587983 is about 13985.2773658587. The cubic root of 195587983 is about 580.4712608644.

The spelling of 195587983 in words is "one hundred ninety-five million, five hundred eighty-seven thousand, nine hundred eighty-three".