135220926989 has 2 divisors, whose sum is σ = 135220926990. Its totient is φ = 135220926988.

The previous prime is 135220926961. The next prime is 135220927033. The reversal of 135220926989 is 989629022531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97862608900 + 37358318089 = 312830^2 + 193283^2 .

It is a cyclic number.

It is not a de Polignac number, because 135220926989 - 2²⁰ = 135219878413 is a prime.

It is a super-2 number, since 2×135220926989² (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 (135220926089) 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, 67610463494 + 67610463495.

It is an arithmetic number, because the mean of its divisors is an integer number (67610463495).

Almost surely, 2^135220926989 is an apocalyptic number.

It is an amenable number.

135220926989 is a deficient number, since it is larger than the sum of its proper divisors (1).

135220926989 is an equidigital number, since it uses as much as digits as its factorization.

135220926989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4199040, while the sum is 56.

The spelling of 135220926989 in words is "one hundred thirty-five billion, two hundred twenty million, nine hundred twenty-six thousand, nine hundred eighty-nine".