195917273 has 4 divisors (see below), whose sum is σ = 196645860. Its totient is φ = 195188688.

The previous prime is 195917263. The next prime is 195917279. The reversal of 195917273 is 372719591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 372719591 = 379 ⋅983429.

It can be written as a sum of positive squares in 2 ways, for example, as 81577024 + 114340249 = 9032^2 + 10693^2 .

It is a cyclic number.

It is not a de Polignac number, because 195917273 - 2¹² = 195913177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195917279) 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, 363890 + ... + 364427.

It is an arithmetic number, because the mean of its divisors is an integer number (49161465).

Almost surely, 2^195917273 is an apocalyptic number.

It is an amenable number.

195917273 is a deficient number, since it is larger than the sum of its proper divisors (728587).

195917273 is an equidigital number, since it uses as much as digits as its factorization.

195917273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728586.

The product of its digits is 119070, while the sum is 44.

The square root of 195917273 is about 13997.0451524599. The cubic root of 195917273 is about 580.7968367846.

The spelling of 195917273 in words is "one hundred ninety-five million, nine hundred seventeen thousand, two hundred seventy-three".