87135418 has 4 divisors (see below), whose sum is σ = 130703130. Its totient is φ = 43567708.

The previous prime is 87135413. The next prime is 87135437. The reversal of 87135418 is 81453178.

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

It can be written as a sum of positive squares in only one way, i.e., 63154809 + 23980609 = 7947^2 + 4897^2 .

It is not an unprimeable number, because it can be changed into a prime (87135413) 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 as a sum of consecutive naturals, namely, 21783853 + ... + 21783856.

Almost surely, 2^87135418 is an apocalyptic number.

87135418 is a deficient number, since it is larger than the sum of its proper divisors (43567712).

87135418 is a wasteful number, since it uses less digits than its factorization.

87135418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43567711.

The product of its digits is 26880, while the sum is 37.

The square root of 87135418 is about 9334.6353972718. The cubic root of 87135418 is about 443.3345447546.

The spelling of 87135418 in words is "eighty-seven million, one hundred thirty-five thousand, four hundred eighteen".