195989039 has 12 divisors (see below), whose sum is σ = 210573792. Its totient is φ = 181782720.

The previous prime is 195989023. The next prime is 195989063. The reversal of 195989039 is 930989591.

It is not a de Polignac number, because 195989039 - 2⁴ = 195989023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195989089) 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 in 11 ways as a sum of consecutive naturals, for example, 84554 + ... + 86840.

It is an arithmetic number, because the mean of its divisors is an integer number (17547816).

Almost surely, 2^195989039 is an apocalyptic number.

195989039 is a deficient number, since it is larger than the sum of its proper divisors (14584753).

195989039 is an equidigital number, since it uses as much as digits as its factorization.

195989039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446 (or 2375 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 53.

The square root of 195989039 is about 13999.6085302411. The cubic root of 195989039 is about 580.8677449061.

The spelling of 195989039 in words is "one hundred ninety-five million, nine hundred eighty-nine thousand, thirty-nine".