195980399 has 4 divisors (see below), whose sum is σ = 198665136. Its totient is φ = 193295664.

The previous prime is 195980363. The next prime is 195980413. The reversal of 195980399 is 993089591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 195980399 - 2¹⁶ = 195914863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195980399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195980339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1342259 + ... + 1342404.

It is an arithmetic number, because the mean of its divisors is an integer number (49666284).

Almost surely, 2^195980399 is an apocalyptic number.

195980399 is a deficient number, since it is larger than the sum of its proper divisors (2684737).

195980399 is an equidigital number, since it uses as much as digits as its factorization.

195980399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684736.

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

The square root of 195980399 is about 13999.2999467831. The cubic root of 195980399 is about 580.8592091038.

The spelling of 195980399 in words is "one hundred ninety-five million, nine hundred eighty thousand, three hundred ninety-nine".