193853945 has 8 divisors (see below), whose sum is σ = 238298760. Its totient is φ = 151300480.

The previous prime is 193853923. The next prime is 193853953. The reversal of 193853945 is 549358391.

It can be written as a sum of positive squares in 4 ways, for example, as 9193024 + 184660921 = 3032^2 + 13589^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 193853945 - 2¹² = 193849849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 193853945.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472610 + ... + 473019.

It is an arithmetic number, because the mean of its divisors is an integer number (29787345).

Almost surely, 2^193853945 is an apocalyptic number.

It is an amenable number.

193853945 is a deficient number, since it is larger than the sum of its proper divisors (44444815).

193853945 is an equidigital number, since it uses as much as digits as its factorization.

193853945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945675.

The product of its digits is 583200, while the sum is 47.

The square root of 193853945 is about 13923.1442210443. The cubic root of 193853945 is about 578.7507246841.

The spelling of 193853945 in words is "one hundred ninety-three million, eight hundred fifty-three thousand, nine hundred forty-five".