195039917 has 4 divisors (see below), whose sum is σ = 195102816. Its totient is φ = 194977020.

The previous prime is 195039857. The next prime is 195039919. The reversal of 195039917 is 719930591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195039917 - 2⁸ = 195039661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195039919) 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, 26543 + ... + 33084.

It is an arithmetic number, because the mean of its divisors is an integer number (48775704).

Almost surely, 2^195039917 is an apocalyptic number.

It is an amenable number.

195039917 is a deficient number, since it is larger than the sum of its proper divisors (62899).

195039917 is an equidigital number, since it uses as much as digits as its factorization.

195039917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62898.

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 195039917 is about 13965.6692285046. The cubic root of 195039917 is about 579.9285653203.

The spelling of 195039917 in words is "one hundred ninety-five million, thirty-nine thousand, nine hundred seventeen".