129393742381 has 2 divisors, whose sum is σ = 129393742382. Its totient is φ = 129393742380.

The previous prime is 129393742369. The next prime is 129393742409. The reversal of 129393742381 is 183247393921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91753862281 + 37639880100 = 302909^2 + 194010^2 .

It is a cyclic number.

It is not a de Polignac number, because 129393742381 - 2¹³ = 129393734189 is a prime.

It is a super-2 number, since 2×129393742381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129393752381) 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 as a sum of consecutive naturals, namely, 64696871190 + 64696871191.

It is an arithmetic number, because the mean of its divisors is an integer number (64696871191).

Almost surely, 2^129393742381 is an apocalyptic number.

It is an amenable number.

129393742381 is a deficient number, since it is larger than the sum of its proper divisors (1).

129393742381 is an equidigital number, since it uses as much as digits as its factorization.

129393742381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 52.

The spelling of 129393742381 in words is "one hundred twenty-nine billion, three hundred ninety-three million, seven hundred forty-two thousand, three hundred eighty-one".