135321420293 has 2 divisors, whose sum is σ = 135321420294. Its totient is φ = 135321420292.

The previous prime is 135321420173. The next prime is 135321420307. The reversal of 135321420293 is 392024123531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95838538084 + 39482882209 = 309578^2 + 198703^2 .

It is an emirp because it is prime and its reverse (392024123531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135321420293 - 2¹⁰ = 135321419269 is a prime.

It is a super-2 number, since 2×135321420293² (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 (135321422293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67660710146 + 67660710147.

It is an arithmetic number, because the mean of its divisors is an integer number (67660710147).

Almost surely, 2^135321420293 is an apocalyptic number.

It is an amenable number.

135321420293 is a deficient number, since it is larger than the sum of its proper divisors (1).

135321420293 is an equidigital number, since it uses as much as digits as its factorization.

135321420293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 135321420293 in words is "one hundred thirty-five billion, three hundred twenty-one million, four hundred twenty thousand, two hundred ninety-three".