87142873 has 6 divisors (see below), whose sum is σ = 91971114. Its totient is φ = 82556064.

The previous prime is 87142859. The next prime is 87142879. The reversal of 87142873 is 37824178.

It can be written as a sum of positive squares in only one way, i.e., 85969984 + 1172889 = 9272^2 + 1083^2 .

It is not a de Polignac number, because 87142873 - 2¹⁷ = 87011801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87142879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120336 + ... + 121057.

It is an arithmetic number, because the mean of its divisors is an integer number (15328519).

Almost surely, 2^87142873 is an apocalyptic number.

It is an amenable number.

87142873 is a deficient number, since it is larger than the sum of its proper divisors (4828241).

87142873 is a wasteful number, since it uses less digits than its factorization.

87142873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241431 (or 241412 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 87142873 is about 9335.0347080233. The cubic root of 87142873 is about 443.3471877757.

The spelling of 87142873 in words is "eighty-seven million, one hundred forty-two thousand, eight hundred seventy-three".