135402013987 has 4 divisors (see below), whose sum is σ = 135622898800. Its totient is φ = 135181129176.

The previous prime is 135402013979. The next prime is 135402013997. The reversal of 135402013987 is 789310204531.

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 135402013987 - 2³ = 135402013979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135402013997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110441487 + ... + 110442712.

It is an arithmetic number, because the mean of its divisors is an integer number (33905724700).

Almost surely, 2^135402013987 is an apocalyptic number.

135402013987 is a deficient number, since it is larger than the sum of its proper divisors (220884813).

135402013987 is an equidigital number, since it uses as much as digits as its factorization.

135402013987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220884812.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 135402013987 in words is "one hundred thirty-five billion, four hundred two million, thirteen thousand, nine hundred eighty-seven".