195785893 has 4 divisors (see below), whose sum is σ = 195813900. Its totient is φ = 195757888.

The previous prime is 195785839. The next prime is 195785897. The reversal of 195785893 is 398587591.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 186677569 + 9108324 = 13663^2 + 3018^2 .

It is a cyclic number.

It is not a de Polignac number, because 195785893 - 2²¹ = 193688741 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 (195785897) 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, 6183 + ... + 20731.

It is an arithmetic number, because the mean of its divisors is an integer number (48953475).

Almost surely, 2^195785893 is an apocalyptic number.

It is an amenable number.

195785893 is a deficient number, since it is larger than the sum of its proper divisors (28007).

195785893 is a wasteful number, since it uses less digits than its factorization.

195785893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28006.

The product of its digits is 2721600, while the sum is 55.

The square root of 195785893 is about 13992.3512320124. The cubic root of 195785893 is about 580.6669823992. Note that the first 3 decimals are identical.

The spelling of 195785893 in words is "one hundred ninety-five million, seven hundred eighty-five thousand, eight hundred ninety-three".