195673645 has 4 divisors (see below), whose sum is σ = 234808380. Its totient is φ = 156538912.

The previous prime is 195673637. The next prime is 195673661. The reversal of 195673645 is 546376591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546376591 = 1019 ⋅536189.

It can be written as a sum of positive squares in 2 ways, for example, as 19660356 + 176013289 = 4434^2 + 13267^2 .

It is a cyclic number.

It is not a de Polignac number, because 195673645 - 2³ = 195673637 is a prime.

It is a super-3 number, since 3×195673645³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 195673595 and 195673604.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19567360 + ... + 19567369.

It is an arithmetic number, because the mean of its divisors is an integer number (58702095).

Almost surely, 2^195673645 is an apocalyptic number.

It is an amenable number.

195673645 is a deficient number, since it is larger than the sum of its proper divisors (39134735).

195673645 is an equidigital number, since it uses as much as digits as its factorization.

195673645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39134734.

The product of its digits is 680400, while the sum is 46.

The square root of 195673645 is about 13988.3396084024. The cubic root of 195673645 is about 580.5559918225. Note that the first 3 decimals are identical.

The spelling of 195673645 in words is "one hundred ninety-five million, six hundred seventy-three thousand, six hundred forty-five".