193842438929 has 2 divisors, whose sum is σ = 193842438930. Its totient is φ = 193842438928.

The previous prime is 193842438863. The next prime is 193842438943. The reversal of 193842438929 is 929834248391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191458753600 + 2383685329 = 437560^2 + 48823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-193842438929 is a prime.

It is a super-2 number, since 2×193842438929² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (193842432929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96921219464 + 96921219465.

It is an arithmetic number, because the mean of its divisors is an integer number (96921219465).

Almost surely, 2^193842438929 is an apocalyptic number.

It is an amenable number.

193842438929 is a deficient number, since it is larger than the sum of its proper divisors (1).

193842438929 is an equidigital number, since it uses as much as digits as its factorization.

193842438929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26873856, while the sum is 62.

The spelling of 193842438929 in words is "one hundred ninety-three billion, eight hundred forty-two million, four hundred thirty-eight thousand, nine hundred twenty-nine".