134515987 has 4 divisors (see below), whose sum is σ = 135575296. Its totient is φ = 133456680.

The previous prime is 134515973. The next prime is 134515993. The reversal of 134515987 is 789515431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789515431 = 761 ⋅1037471.

It is not a de Polignac number, because 134515987 - 2¹⁹ = 133991699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134515487) 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, 529464 + ... + 529717.

It is an arithmetic number, because the mean of its divisors is an integer number (33893824).

Almost surely, 2^134515987 is an apocalyptic number.

134515987 is a deficient number, since it is larger than the sum of its proper divisors (1059309).

134515987 is a wasteful number, since it uses less digits than its factorization.

134515987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059308.

The product of its digits is 151200, while the sum is 43.

The square root of 134515987 is about 11598.1027327749. The cubic root of 134515987 is about 512.3789753490.

The spelling of 134515987 in words is "one hundred thirty-four million, five hundred fifteen thousand, nine hundred eighty-seven".