135304313257 has 2 divisors, whose sum is σ = 135304313258. Its totient is φ = 135304313256.

The previous prime is 135304313237. The next prime is 135304313273. The reversal of 135304313257 is 752313403531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132662764441 + 2641548816 = 364229^2 + 51396^2 .

It is a cyclic number.

It is not a de Polignac number, because 135304313257 - 2¹¹ = 135304311209 is a prime.

It is not a weakly prime, because it can be changed into another prime (135304313237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67652156628 + 67652156629.

It is an arithmetic number, because the mean of its divisors is an integer number (67652156629).

Almost surely, 2^135304313257 is an apocalyptic number.

It is an amenable number.

135304313257 is a deficient number, since it is larger than the sum of its proper divisors (1).

135304313257 is an equidigital number, since it uses as much as digits as its factorization.

135304313257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 37.

Adding to 135304313257 its reverse (752313403531), we get a palindrome (887617716788).

The spelling of 135304313257 in words is "one hundred thirty-five billion, three hundred four million, three hundred thirteen thousand, two hundred fifty-seven".