87091318 has 4 divisors (see below), whose sum is σ = 130636980. Its totient is φ = 43545658.

The previous prime is 87091313. The next prime is 87091337. The reversal of 87091318 is 81319078.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81319078 = 2 ⋅40659539.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87091313) 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, 21772828 + ... + 21772831.

It is an arithmetic number, because the mean of its divisors is an integer number (32659245).

Almost surely, 2^87091318 is an apocalyptic number.

87091318 is a deficient number, since it is larger than the sum of its proper divisors (43545662).

87091318 is a wasteful number, since it uses less digits than its factorization.

87091318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43545661.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 87091318 is about 9332.2729278563. The cubic root of 87091318 is about 443.2597402984.

The spelling of 87091318 in words is "eighty-seven million, ninety-one thousand, three hundred eighteen".