135780787 has 4 divisors (see below), whose sum is σ = 139450576. Its totient is φ = 132111000.

The previous prime is 135780773. The next prime is 135780797. The reversal of 135780787 is 787087531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135780787 - 2²³ = 127392179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135780797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1834839 + ... + 1834912.

It is an arithmetic number, because the mean of its divisors is an integer number (34862644).

Almost surely, 2^135780787 is an apocalyptic number.

135780787 is a deficient number, since it is larger than the sum of its proper divisors (3669789).

135780787 is an equidigital number, since it uses as much as digits as its factorization.

135780787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669788.

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

The square root of 135780787 is about 11652.5013194593. The cubic root of 135780787 is about 513.9798664312.

The spelling of 135780787 in words is "one hundred thirty-five million, seven hundred eighty thousand, seven hundred eighty-seven".