135076876721 has 2 divisors, whose sum is σ = 135076876722. Its totient is φ = 135076876720.

The previous prime is 135076876703. The next prime is 135076876777. The reversal of 135076876721 is 127678670531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76930788496 + 58146088225 = 277364^2 + 241135^2 .

It is an emirp because it is prime and its reverse (127678670531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135076876721 - 2²² = 135072682417 is a prime.

It is not a weakly prime, because it can be changed into another prime (135076476721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67538438360 + 67538438361.

It is an arithmetic number, because the mean of its divisors is an integer number (67538438361).

Almost surely, 2^135076876721 is an apocalyptic number.

It is an amenable number.

135076876721 is a deficient number, since it is larger than the sum of its proper divisors (1).

135076876721 is an equidigital number, since it uses as much as digits as its factorization.

135076876721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 135076876721 in words is "one hundred thirty-five billion, seventy-six million, eight hundred seventy-six thousand, seven hundred twenty-one".