87135897 has 16 divisors (see below), whose sum is σ = 123206400. Its totient is φ = 54588672.

The previous prime is 87135889. The next prime is 87135899. The reversal of 87135897 is 79853178.

It is not a de Polignac number, because 87135897 - 2³ = 87135889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87135899) 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 in 15 ways as a sum of consecutive naturals, for example, 55479 + ... + 57027.

It is an arithmetic number, because the mean of its divisors is an integer number (7700400).

Almost surely, 2^87135897 is an apocalyptic number.

It is an amenable number.

87135897 is a deficient number, since it is larger than the sum of its proper divisors (36070503).

87135897 is a wasteful number, since it uses less digits than its factorization.

87135897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2672.

The product of its digits is 423360, while the sum is 48.

The square root of 87135897 is about 9334.6610543715. The cubic root of 87135897 is about 443.3353571179.

The spelling of 87135897 in words is "eighty-seven million, one hundred thirty-five thousand, eight hundred ninety-seven".