135437398709 has 2 divisors, whose sum is σ = 135437398710. Its totient is φ = 135437398708.

The previous prime is 135437398619. The next prime is 135437398777. The reversal of 135437398709 is 907893734531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99447514609 + 35989884100 = 315353^2 + 189710^2 .

It is a cyclic number.

It is not a de Polignac number, because 135437398709 - 2¹⁶ = 135437333173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135437398309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67718699354 + 67718699355.

It is an arithmetic number, because the mean of its divisors is an integer number (67718699355).

Almost surely, 2^135437398709 is an apocalyptic number.

It is an amenable number.

135437398709 is a deficient number, since it is larger than the sum of its proper divisors (1).

135437398709 is an equidigital number, since it uses as much as digits as its factorization.

135437398709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17146080, while the sum is 59.

The spelling of 135437398709 in words is "one hundred thirty-five billion, four hundred thirty-seven million, three hundred ninety-eight thousand, seven hundred nine".