87004787 has 4 divisors (see below), whose sum is σ = 87388296. Its totient is φ = 86621280.

The previous prime is 87004777. The next prime is 87004789. The reversal of 87004787 is 78740078.

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 87004787 - 2²⁶ = 19895923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87004789) 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, 191414 + ... + 191867.

It is an arithmetic number, because the mean of its divisors is an integer number (21847074).

Almost surely, 2^87004787 is an apocalyptic number.

87004787 is a deficient number, since it is larger than the sum of its proper divisors (383509).

87004787 is a wasteful number, since it uses less digits than its factorization.

87004787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383508.

The product of its (nonzero) digits is 87808, while the sum is 41.

The square root of 87004787 is about 9327.6356596943. The cubic root of 87004787 is about 443.1128890031.

The spelling of 87004787 in words is "eighty-seven million, four thousand, seven hundred eighty-seven".