87287687 has 4 divisors (see below), whose sum is σ = 87486960. Its totient is φ = 87088416.

The previous prime is 87287677. The next prime is 87287689. The reversal of 87287687 is 78678278.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87287687 - 2⁶ = 87287623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87287689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98978 + ... + 99855.

It is an arithmetic number, because the mean of its divisors is an integer number (21871740).

Almost surely, 2^87287687 is an apocalyptic number.

87287687 is a deficient number, since it is larger than the sum of its proper divisors (199273).

87287687 is a wasteful number, since it uses less digits than its factorization.

87287687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199272.

The product of its digits is 2107392, while the sum is 53.

The square root of 87287687 is about 9342.7879671969. The cubic root of 87287687 is about 443.5926366044.

The spelling of 87287687 in words is "eighty-seven million, two hundred eighty-seven thousand, six hundred eighty-seven".