134209436981 has 2 divisors, whose sum is σ = 134209436982. Its totient is φ = 134209436980.

The previous prime is 134209436957. The next prime is 134209436983. The reversal of 134209436981 is 189634902431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98554556356 + 35654880625 = 313934^2 + 188825^2 .

It is a cyclic number.

It is not a de Polignac number, because 134209436981 - 2⁶ = 134209436917 is a prime.

It is a super-2 number, since 2×134209436981² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 134209436983, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134209436983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67104718490 + 67104718491.

It is an arithmetic number, because the mean of its divisors is an integer number (67104718491).

Almost surely, 2^134209436981 is an apocalyptic number.

It is an amenable number.

134209436981 is a deficient number, since it is larger than the sum of its proper divisors (1).

134209436981 is an equidigital number, since it uses as much as digits as its factorization.

134209436981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 134209436981 in words is "one hundred thirty-four billion, two hundred nine million, four hundred thirty-six thousand, nine hundred eighty-one".