195797739 has 8 divisors (see below), whose sum is σ = 265343632. Its totient is φ = 128391840.

The previous prime is 195797737. The next prime is 195797759. The reversal of 195797739 is 937797591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 195797739 - 2¹ = 195797737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195797731) 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 7 ways as a sum of consecutive naturals, for example, 534784 + ... + 535149.

It is an arithmetic number, because the mean of its divisors is an integer number (33167954).

Almost surely, 2^195797739 is an apocalyptic number.

195797739 is a deficient number, since it is larger than the sum of its proper divisors (69545893).

195797739 is a wasteful number, since it uses less digits than its factorization.

195797739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069997.

The product of its digits is 3750705, while the sum is 57.

The square root of 195797739 is about 13992.7745283057. The cubic root of 195797739 is about 580.6786932231.

The spelling of 195797739 in words is "one hundred ninety-five million, seven hundred ninety-seven thousand, seven hundred thirty-nine".