193139143 has 2 divisors, whose sum is σ = 193139144. Its totient is φ = 193139142.

The previous prime is 193139137. The next prime is 193139147. The reversal of 193139143 is 341931391.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-193139143 is a prime.

It is equal to p_10719844 and since 193139143 and 10719844 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 193139099 and 193139108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193139147) 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, 96569571 + 96569572.

It is an arithmetic number, because the mean of its divisors is an integer number (96569572).

Almost surely, 2^193139143 is an apocalyptic number.

193139143 is the 7429-th centered heptagonal number.

193139143 is a deficient number, since it is larger than the sum of its proper divisors (1).

193139143 is an equidigital number, since it uses as much as digits as its factorization.

193139143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 34.

The square root of 193139143 is about 13897.4509533223. The cubic root of 193139143 is about 578.0385017236.

The spelling of 193139143 in words is "one hundred ninety-three million, one hundred thirty-nine thousand, one hundred forty-three".