135973044253 has 2 divisors, whose sum is σ = 135973044254. Its totient is φ = 135973044252.

The previous prime is 135973044241. The next prime is 135973044313. The reversal of 135973044253 is 352440379531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135557985124 + 415059129 = 368182^2 + 20373^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135973044253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135973044653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67986522126 + 67986522127.

It is an arithmetic number, because the mean of its divisors is an integer number (67986522127).

Almost surely, 2^135973044253 is an apocalyptic number.

It is an amenable number.

135973044253 is a deficient number, since it is larger than the sum of its proper divisors (1).

135973044253 is an equidigital number, since it uses as much as digits as its factorization.

135973044253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 135973044253 in words is "one hundred thirty-five billion, nine hundred seventy-three million, forty-four thousand, two hundred fifty-three".