87858689 has 4 divisors (see below), whose sum is σ = 91678656. Its totient is φ = 84038724.

The previous prime is 87858671. The next prime is 87858697. The reversal of 87858689 is 98685878.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87858689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87858629) 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, 1909949 + ... + 1909994.

It is an arithmetic number, because the mean of its divisors is an integer number (22919664).

Almost surely, 2^87858689 is an apocalyptic number.

It is an amenable number.

87858689 is a deficient number, since it is larger than the sum of its proper divisors (3819967).

87858689 is a wasteful number, since it uses less digits than its factorization.

87858689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819966.

The product of its digits is 7741440, while the sum is 59.

The square root of 87858689 is about 9373.2965919147. The cubic root of 87858689 is about 444.5578050674.

The spelling of 87858689 in words is "eighty-seven million, eight hundred fifty-eight thousand, six hundred eighty-nine".