87686907 has 16 divisors (see below), whose sum is σ = 145765632. Its totient is φ = 45551520.

The previous prime is 87686891. The next prime is 87686939. The reversal of 87686907 is 70968678.

It is a happy number.

It is not a de Polignac number, because 87686907 - 2⁴ = 87686891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87686907.

It is not an unprimeable number, because it can be changed into a prime (87681907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189568 + ... + 190029.

It is an arithmetic number, because the mean of its divisors is an integer number (9110352).

Almost surely, 2^87686907 is an apocalyptic number.

87686907 is a deficient number, since it is larger than the sum of its proper divisors (58078725).

87686907 is a wasteful number, since it uses less digits than its factorization.

87686907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379618.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 87686907 is about 9364.1287368340. The cubic root of 87686907 is about 444.2678817257.

The spelling of 87686907 in words is "eighty-seven million, six hundred eighty-six thousand, nine hundred seven".