135899998109 has 2 divisors, whose sum is σ = 135899998110. Its totient is φ = 135899998108.

The previous prime is 135899998051. The next prime is 135899998159. The reversal of 135899998109 is 901899998531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97732514884 + 38167483225 = 312622^2 + 195365^2 .

It is a cyclic number.

It is not a de Polignac number, because 135899998109 - 2¹⁶ = 135899932573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135899998159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67949999054 + 67949999055.

It is an arithmetic number, because the mean of its divisors is an integer number (67949999055).

Almost surely, 2^135899998109 is an apocalyptic number.

It is an amenable number.

135899998109 is a deficient number, since it is larger than the sum of its proper divisors (1).

135899998109 is an equidigital number, since it uses as much as digits as its factorization.

135899998109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56687040, while the sum is 71.

The spelling of 135899998109 in words is "one hundred thirty-five billion, eight hundred ninety-nine million, nine hundred ninety-eight thousand, one hundred nine".