87161589 has 10 divisors (see below), whose sum is σ = 130204470. Its totient is φ = 58107672.

The previous prime is 87161551. The next prime is 87161597. The reversal of 87161589 is 98516178.

87161589 is a `hidden beast` number, since 8 + 7 + 1 + 61 + 589 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43996689 + 43164900 = 6633^2 + 6570^2 .

It is not a de Polignac number, because 87161589 - 2²¹ = 85064437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87161509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 537954 + ... + 538115.

It is an arithmetic number, because the mean of its divisors is an integer number (13020447).

Almost surely, 2^87161589 is an apocalyptic number.

It is an amenable number.

87161589 is a deficient number, since it is larger than the sum of its proper divisors (43042881).

87161589 is a wasteful number, since it uses less digits than its factorization.

87161589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076081 (or 1076072 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 87161589 is about 9336.0371143221. The cubic root of 87161589 is about 443.3789252802.

The spelling of 87161589 in words is "eighty-seven million, one hundred sixty-one thousand, five hundred eighty-nine".