193555139 has 2 divisors, whose sum is σ = 193555140. Its totient is φ = 193555138.

The previous prime is 193555093. The next prime is 193555163. The reversal of 193555139 is 931555391.

193555139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-193555139 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 193555096 and 193555105.

It is not a weakly prime, because it can be changed into another prime (193555039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96777569 + 96777570.

It is an arithmetic number, because the mean of its divisors is an integer number (96777570).

Almost surely, 2^193555139 is an apocalyptic number.

193555139 is a deficient number, since it is larger than the sum of its proper divisors (1).

193555139 is an equidigital number, since it uses as much as digits as its factorization.

193555139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91125, while the sum is 41.

The square root of 193555139 is about 13912.4095325001. The cubic root of 193555139 is about 578.4532101152.

The spelling of 193555139 in words is "one hundred ninety-three million, five hundred fifty-five thousand, one hundred thirty-nine".