193338945 has 24 divisors (see below), whose sum is σ = 338583336. Its totient is φ = 102048768.

The previous prime is 193338941. The next prime is 193338953. The reversal of 193338945 is 549833391.

It can be written as a sum of positive squares in 4 ways, for example, as 45643536 + 147695409 = 6756^2 + 12153^2 .

It is not a de Polignac number, because 193338945 - 2² = 193338941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 193338945.

It is not an unprimeable number, because it can be changed into a prime (193338941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17782 + ... + 26511.

It is an arithmetic number, because the mean of its divisors is an integer number (14107639).

Almost surely, 2^193338945 is an apocalyptic number.

193338945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

193338945 is a deficient number, since it is larger than the sum of its proper divisors (145244391).

193338945 is a wasteful number, since it uses less digits than its factorization.

193338945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44401 (or 44398 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 193338945 is about 13904.6375357289. The cubic root of 193338945 is about 578.2377595298.

The spelling of 193338945 in words is "one hundred ninety-three million, three hundred thirty-eight thousand, nine hundred forty-five".