87205867 has 4 divisors (see below), whose sum is σ = 99663856. Its totient is φ = 74747880.

The previous prime is 87205861. The next prime is 87205907. The reversal of 87205867 is 76850278.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87205867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87205861) 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, 6228984 + ... + 6228997.

It is an arithmetic number, because the mean of its divisors is an integer number (24915964).

Almost surely, 2^87205867 is an apocalyptic number.

87205867 is a deficient number, since it is larger than the sum of its proper divisors (12457989).

87205867 is a wasteful number, since it uses less digits than its factorization.

87205867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12457988.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 87205867 is about 9338.4081619942. The cubic root of 87205867 is about 443.4539912540.

The spelling of 87205867 in words is "eighty-seven million, two hundred five thousand, eight hundred sixty-seven".