87563647 has 4 divisors (see below), whose sum is σ = 92172280. Its totient is φ = 82955016.

The previous prime is 87563639. The next prime is 87563669. The reversal of 87563647 is 74636578.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74636578 = 2 ⋅37318289.

It is a cyclic number.

It is not a de Polignac number, because 87563647 - 2³ = 87563639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87563597 and 87563606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87563677) 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, 2304288 + ... + 2304325.

It is an arithmetic number, because the mean of its divisors is an integer number (23043070).

Almost surely, 2^87563647 is an apocalyptic number.

87563647 is a deficient number, since it is larger than the sum of its proper divisors (4608633).

87563647 is a wasteful number, since it uses less digits than its factorization.

87563647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608632.

The product of its digits is 846720, while the sum is 46.

The square root of 87563647 is about 9357.5449237500. The cubic root of 87563647 is about 444.0596174985.

It can be divided in two parts, 8756 and 3647, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 87563647 in words is "eighty-seven million, five hundred sixty-three thousand, six hundred forty-seven".