135534403987 has 4 divisors (see below), whose sum is σ = 135536427936. Its totient is φ = 135532380040.

The previous prime is 135534403843. The next prime is 135534404021. The reversal of 135534403987 is 789304435531.

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 135534403987 - 2³¹ = 133386920339 is a prime.

It is a super-2 number, since 2×135534403987² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135534403187) 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, 907963 + ... + 1046644.

It is an arithmetic number, because the mean of its divisors is an integer number (33884106984).

Almost surely, 2^135534403987 is an apocalyptic number.

135534403987 is a deficient number, since it is larger than the sum of its proper divisors (2023949).

135534403987 is an equidigital number, since it uses as much as digits as its factorization.

135534403987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023948.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 135534403987 in words is "one hundred thirty-five billion, five hundred thirty-four million, four hundred three thousand, nine hundred eighty-seven".