87663867 has 4 divisors (see below), whose sum is σ = 116885160. Its totient is φ = 58442576.

The previous prime is 87663857. The next prime is 87663869. The reversal of 87663867 is 76836678.

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 87663867 - 2¹⁸ = 87401723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87663869) 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, 14610642 + ... + 14610647.

It is an arithmetic number, because the mean of its divisors is an integer number (29221290).

Almost surely, 2^87663867 is an apocalyptic number.

87663867 is a deficient number, since it is larger than the sum of its proper divisors (29221293).

87663867 is a wasteful number, since it uses less digits than its factorization.

87663867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29221292.

The product of its digits is 2032128, while the sum is 51.

The square root of 87663867 is about 9362.8984294395. The cubic root of 87663867 is about 444.2289674074.

The spelling of 87663867 in words is "eighty-seven million, six hundred sixty-three thousand, eight hundred sixty-seven".