87140686 has 4 divisors (see below), whose sum is σ = 130711032. Its totient is φ = 43570342.

The previous prime is 87140681. The next prime is 87140689. The reversal of 87140686 is 68604178.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87140681) 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, 21785170 + ... + 21785173.

It is an arithmetic number, because the mean of its divisors is an integer number (32677758).

Almost surely, 2^87140686 is an apocalyptic number.

87140686 is a deficient number, since it is larger than the sum of its proper divisors (43570346).

87140686 is a wasteful number, since it uses less digits than its factorization.

87140686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43570345.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 87140686 is about 9334.9175679274. The cubic root of 87140686 is about 443.3434788917.

The spelling of 87140686 in words is "eighty-seven million, one hundred forty thousand, six hundred eighty-six".