87586643 has 4 divisors (see below), whose sum is σ = 87728760. Its totient is φ = 87444528.

The previous prime is 87586607. The next prime is 87586651. The reversal of 87586643 is 34668578.

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-87586643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87586673) 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, 70130 + ... + 71367.

It is an arithmetic number, because the mean of its divisors is an integer number (21932190).

Almost surely, 2^87586643 is an apocalyptic number.

87586643 is a deficient number, since it is larger than the sum of its proper divisors (142117).

87586643 is a wasteful number, since it uses less digits than its factorization.

87586643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142116.

The product of its digits is 967680, while the sum is 47.

The square root of 87586643 is about 9358.7735841829. The cubic root of 87586643 is about 444.0984871341.

The spelling of 87586643 in words is "eighty-seven million, five hundred eighty-six thousand, six hundred forty-three".