195105439 has 4 divisors (see below), whose sum is σ = 196397680. Its totient is φ = 193813200.

The previous prime is 195105397. The next prime is 195105457. The reversal of 195105439 is 934501591.

It is a happy number.

195105439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 195105439 - 2²⁷ = 60887711 is a prime.

It is a super-2 number, since 2×195105439² = 76132264654765442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195105398 and 195105407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195105479) 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, 645894 + ... + 646195.

It is an arithmetic number, because the mean of its divisors is an integer number (49099420).

Almost surely, 2^195105439 is an apocalyptic number.

195105439 is a deficient number, since it is larger than the sum of its proper divisors (1292241).

195105439 is a wasteful number, since it uses less digits than its factorization.

195105439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292240.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 195105439 is about 13968.0148553758. The cubic root of 195105439 is about 579.9934987381.

The spelling of 195105439 in words is "one hundred ninety-five million, one hundred five thousand, four hundred thirty-nine".