193738745 has 12 divisors (see below), whose sum is σ = 236594604. Its totient is φ = 152258880.

The previous prime is 193738717. The next prime is 193738757. The reversal of 193738745 is 547837391.

It can be written as a sum of positive squares in 6 ways, for example, as 27741289 + 165997456 = 5267^2 + 12884^2 .

It is a de Polignac number, because none of the positive numbers 2^k-193738745 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 193738745.

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 11 ways as a sum of consecutive naturals, for example, 242687 + ... + 243483.

It is an arithmetic number, because the mean of its divisors is an integer number (19716217).

Almost surely, 2^193738745 is an apocalyptic number.

It is an amenable number.

193738745 is a deficient number, since it is larger than the sum of its proper divisors (42855859).

193738745 is an frugal number, since it uses more digits than its factorization.

193738745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660 (or 863 counting only the distinct ones).

The product of its digits is 635040, while the sum is 47.

The square root of 193738745 is about 13919.0066096687. The cubic root of 193738745 is about 578.6360588124.

The spelling of 193738745 in words is "one hundred ninety-three million, seven hundred thirty-eight thousand, seven hundred forty-five".