195420017 has 4 divisors (see below), whose sum is σ = 210452340. Its totient is φ = 180387696.

The previous prime is 195420013. The next prime is 195420047. The reversal of 195420017 is 710024591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 710024591 = 12253 ⋅57947.

It can be written as a sum of positive squares in 2 ways, for example, as 12737761 + 182682256 = 3569^2 + 13516^2 .

It is a cyclic number.

It is not a de Polignac number, because 195420017 - 2² = 195420013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195420011) 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, 7516142 + ... + 7516167.

It is an arithmetic number, because the mean of its divisors is an integer number (52613085).

Almost surely, 2^195420017 is an apocalyptic number.

It is an amenable number.

195420017 is a deficient number, since it is larger than the sum of its proper divisors (15032323).

195420017 is a wasteful number, since it uses less digits than its factorization.

195420017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15032322.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 195420017 is about 13979.2709752691. The cubic root of 195420017 is about 580.3050486093.

The spelling of 195420017 in words is "one hundred ninety-five million, four hundred twenty thousand, seventeen".