195213917 has 4 divisors (see below), whose sum is σ = 195258396. Its totient is φ = 195169440.

The previous prime is 195213901. The next prime is 195213929. The reversal of 195213917 is 719312591.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29474041 + 165739876 = 5429^2 + 12874^2 .

It is a cyclic number.

It is not a de Polignac number, because 195213917 - 2⁴ = 195213901 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 (195213017) 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, 14834 + ... + 24707.

It is an arithmetic number, because the mean of its divisors is an integer number (48814599).

Almost surely, 2^195213917 is an apocalyptic number.

It is an amenable number.

195213917 is a deficient number, since it is larger than the sum of its proper divisors (44479).

195213917 is an equidigital number, since it uses as much as digits as its factorization.

195213917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44478.

The product of its digits is 17010, while the sum is 38.

The square root of 195213917 is about 13971.8974015701. The cubic root of 195213917 is about 580.1009703326.

The spelling of 195213917 in words is "one hundred ninety-five million, two hundred thirteen thousand, nine hundred seventeen".