195208989 has 16 divisors (see below), whose sum is σ = 265379520. Its totient is φ = 127607040.

The previous prime is 195208939. The next prime is 195209009. The reversal of 195208989 is 989802591.

It is not a de Polignac number, because 195208989 - 2⁹ = 195208477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195208939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43909 + ... + 48149.

It is an arithmetic number, because the mean of its divisors is an integer number (16586220).

Almost surely, 2^195208989 is an apocalyptic number.

It is an amenable number.

195208989 is a deficient number, since it is larger than the sum of its proper divisors (70170531).

195208989 is a wasteful number, since it uses less digits than its factorization.

195208989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4540.

The product of its (nonzero) digits is 466560, while the sum is 51.

The square root of 195208989 is about 13971.7210464567. The cubic root of 195208989 is about 580.0960889155.

The spelling of 195208989 in words is "one hundred ninety-five million, two hundred eight thousand, nine hundred eighty-nine".