193978225 has 12 divisors (see below), whose sum is σ = 274895104. Its totient is φ = 133013520.

The previous prime is 193978223. The next prime is 193978229. The reversal of 193978225 is 522879391.

It is not a de Polignac number, because 193978225 - 2¹ = 193978223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (193978223) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 554049 + ... + 554398.

Almost surely, 2^193978225 is an apocalyptic number.

It is an amenable number.

193978225 is a deficient number, since it is larger than the sum of its proper divisors (80916879).

193978225 is a wasteful number, since it uses less digits than its factorization.

193978225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108464 (or 1108459 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 193978225 is about 13927.6065783034. The cubic root of 193978225 is about 578.8743775278.

The spelling of 193978225 in words is "one hundred ninety-three million, nine hundred seventy-eight thousand, two hundred twenty-five".