195989199 has 16 divisors (see below), whose sum is σ = 314369280. Its totient is φ = 106099200.

The previous prime is 195989197. The next prime is 195989203. The reversal of 195989199 is 991989591.

It is a happy number.

It is not a de Polignac number, because 195989199 - 2¹ = 195989197 is a prime.

It is a super-2 number, since 2×195989199² = 76823532249323202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195989191) 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, 245202 + ... + 245999.

It is an arithmetic number, because the mean of its divisors is an integer number (19648080).

Almost surely, 2^195989199 is an apocalyptic number.

195989199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

195989199 is a deficient number, since it is larger than the sum of its proper divisors (118380081).

195989199 is a wasteful number, since it uses less digits than its factorization.

195989199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491230.

The product of its digits is 2361960, while the sum is 60.

The square root of 195989199 is about 13999.6142446855. The cubic root of 195989199 is about 580.8679029742.

The spelling of 195989199 in words is "one hundred ninety-five million, nine hundred eighty-nine thousand, one hundred ninety-nine".