195199387 has 4 divisors (see below), whose sum is σ = 196509600. Its totient is φ = 193889176.

The previous prime is 195199373. The next prime is 195199399. The reversal of 195199387 is 783991591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783991591 = 6007 ⋅130513.

It is a cyclic number.

It is not a de Polignac number, because 195199387 - 2¹⁹ = 194675099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195199307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654883 + ... + 655180.

It is an arithmetic number, because the mean of its divisors is an integer number (49127400).

Almost surely, 2^195199387 is an apocalyptic number.

195199387 is a deficient number, since it is larger than the sum of its proper divisors (1310213).

195199387 is a wasteful number, since it uses less digits than its factorization.

195199387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310212.

The product of its digits is 612360, while the sum is 52.

The square root of 195199387 is about 13971.3774195675. The cubic root of 195199387 is about 580.0865774444.

The spelling of 195199387 in words is "one hundred ninety-five million, one hundred ninety-nine thousand, three hundred eighty-seven".