29138107981 has 2 divisors, whose sum is σ = 29138107982. Its totient is φ = 29138107980.

The previous prime is 29138107969. The next prime is 29138107993. The reversal of 29138107981 is 18970183192.

It is a balanced prime because it is at equal distance from previous prime (29138107969) and next prime (29138107993).

It can be written as a sum of positive squares in only one way, i.e., 25424302500 + 3713805481 = 159450^2 + 60941^2 .

It is a cyclic number.

It is not a de Polignac number, because 29138107981 - 2²¹ = 29136010829 is a prime.

It is a super-2 number, since 2×29138107981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29138107781) 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, 14569053990 + 14569053991.

It is an arithmetic number, because the mean of its divisors is an integer number (14569053991).

Almost surely, 2^29138107981 is an apocalyptic number.

It is an amenable number.

29138107981 is a deficient number, since it is larger than the sum of its proper divisors (1).

29138107981 is an equidigital number, since it uses as much as digits as its factorization.

29138107981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 49.

The spelling of 29138107981 in words is "twenty-nine billion, one hundred thirty-eight million, one hundred seven thousand, nine hundred eighty-one".