87647263 has 4 divisors (see below), whose sum is σ = 95615208. Its totient is φ = 79679320.

The previous prime is 87647249. The next prime is 87647269. The reversal of 87647263 is 36274678.

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 87647263 - 2⁹ = 87646751 is a prime.

It is a super-2 number, since 2×87647263² = 15364085422782338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87647269) 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, 3983956 + ... + 3983977.

It is an arithmetic number, because the mean of its divisors is an integer number (23903802).

Almost surely, 2^87647263 is an apocalyptic number.

87647263 is a deficient number, since it is larger than the sum of its proper divisors (7967945).

87647263 is a wasteful number, since it uses less digits than its factorization.

87647263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7967944.

The product of its digits is 338688, while the sum is 43.

The square root of 87647263 is about 9362.0116962115. The cubic root of 87647263 is about 444.2009191979.

The spelling of 87647263 in words is "eighty-seven million, six hundred forty-seven thousand, two hundred sixty-three".