135777309 has 16 divisors (see below), whose sum is σ = 188714688. Its totient is φ = 86752512.

The previous prime is 135777307. The next prime is 135777311. The reversal of 135777309 is 903777531.

It is an interprime number because it is at equal distance from previous prime (135777307) and next prime (135777311).

It is not a de Polignac number, because 135777309 - 2¹ = 135777307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135777307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1692 + ... + 16565.

It is an arithmetic number, because the mean of its divisors is an integer number (11794668).

Almost surely, 2^135777309 is an apocalyptic number.

It is an amenable number.

135777309 is a deficient number, since it is larger than the sum of its proper divisors (52937379).

135777309 is a wasteful number, since it uses less digits than its factorization.

135777309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18364.

The product of its (nonzero) digits is 138915, while the sum is 42.

The square root of 135777309 is about 11652.3520801596. The cubic root of 135777309 is about 513.9754778936.

The spelling of 135777309 in words is "one hundred thirty-five million, seven hundred seventy-seven thousand, three hundred nine".