195864499 has 2 divisors, whose sum is σ = 195864500. Its totient is φ = 195864498.

The previous prime is 195864469. The next prime is 195864509. The reversal of 195864499 is 994468591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195864499 - 2⁵ = 195864467 is a prime.

It is not a weakly prime, because it can be changed into another prime (195864419) 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, 97932249 + 97932250.

It is an arithmetic number, because the mean of its divisors is an integer number (97932250).

Almost surely, 2^195864499 is an apocalyptic number.

195864499 is a deficient number, since it is larger than the sum of its proper divisors (1).

195864499 is an equidigital number, since it uses as much as digits as its factorization.

195864499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 55.

The square root of 195864499 is about 13995.1598418882. The cubic root of 195864499 is about 580.7446825865.

The spelling of 195864499 in words is "one hundred ninety-five million, eight hundred sixty-four thousand, four hundred ninety-nine".