193955137 has 2 divisors, whose sum is σ = 193955138. Its totient is φ = 193955136.

The previous prime is 193955101. The next prime is 193955141. The reversal of 193955137 is 731559391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187032976 + 6922161 = 13676^2 + 2631^2 .

It is a cyclic number.

It is not a de Polignac number, because 193955137 - 2⁷ = 193955009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 193955093 and 193955102.

It is not a weakly prime, because it can be changed into another prime (193955197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96977568 + 96977569.

It is an arithmetic number, because the mean of its divisors is an integer number (96977569).

Almost surely, 2^193955137 is an apocalyptic number.

It is an amenable number.

193955137 is a deficient number, since it is larger than the sum of its proper divisors (1).

193955137 is an equidigital number, since it uses as much as digits as its factorization.

193955137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127575, while the sum is 43.

The square root of 193955137 is about 13926.7776962225. Note that the first 3 decimals coincide. The cubic root of 193955137 is about 578.8514100325.

The spelling of 193955137 in words is "one hundred ninety-three million, nine hundred fifty-five thousand, one hundred thirty-seven".