87543859 has 8 divisors (see below), whose sum is σ = 94838240. Its totient is φ = 80807688.

The previous prime is 87543847. The next prime is 87543889. The reversal of 87543859 is 95834578.

It is not a de Polignac number, because 87543859 - 2⁹ = 87543347 is a prime.

It is a super-2 number, since 2×87543859² = 15327854497223762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87543839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17727 + ... + 22120.

It is an arithmetic number, because the mean of its divisors is an integer number (11854780).

Almost surely, 2^87543859 is an apocalyptic number.

87543859 is a deficient number, since it is larger than the sum of its proper divisors (7294381).

87543859 is an equidigital number, since it uses as much as digits as its factorization.

87543859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39886 (or 39860 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 49.

The square root of 87543859 is about 9356.4875353949. The cubic root of 87543859 is about 444.0261648272.

The spelling of 87543859 in words is "eighty-seven million, five hundred forty-three thousand, eight hundred fifty-nine".