135780877 has 2 divisors, whose sum is σ = 135780878. Its totient is φ = 135780876.

The previous prime is 135780863. The next prime is 135780901. The reversal of 135780877 is 778087531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70073641 + 65707236 = 8371^2 + 8106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135780877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135780847) 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 as a sum of consecutive naturals, namely, 67890438 + 67890439.

It is an arithmetic number, because the mean of its divisors is an integer number (67890439).

Almost surely, 2^135780877 is an apocalyptic number.

It is an amenable number.

135780877 is a deficient number, since it is larger than the sum of its proper divisors (1).

135780877 is an equidigital number, since it uses as much as digits as its factorization.

135780877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 329280, while the sum is 46.

The square root of 135780877 is about 11652.5051812904. The cubic root of 135780877 is about 513.9799799921.

The spelling of 135780877 in words is "one hundred thirty-five million, seven hundred eighty thousand, eight hundred seventy-seven".