195939445 has 16 divisors (see below), whose sum is σ = 254726640. Its totient is φ = 144685632.

The previous prime is 195939439. The next prime is 195939473. The reversal of 195939445 is 544939591.

It can be written as a sum of positive squares in 8 ways, for example, as 111133764 + 84805681 = 10542^2 + 9209^2 .

It is a de Polignac number, because none of the positive numbers 2^k-195939445 is a prime.

It is a super-2 number, since 2×195939445² = 76784532213816050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 2067 + ... + 19903.

It is an arithmetic number, because the mean of its divisors is an integer number (15920415).

Almost surely, 2^195939445 is an apocalyptic number.

It is an amenable number.

195939445 is a deficient number, since it is larger than the sum of its proper divisors (58787195).

195939445 is an equidigital number, since it uses as much as digits as its factorization.

195939445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17881 (or 17855 counting only the distinct ones).

The product of its digits is 874800, while the sum is 49.

The square root of 195939445 is about 13997.8371543607. The cubic root of 195939445 is about 580.8187455925.

The spelling of 195939445 in words is "one hundred ninety-five million, nine hundred thirty-nine thousand, four hundred forty-five".