87591671 has 4 divisors (see below), whose sum is σ = 87843000. Its totient is φ = 87340344.

The previous prime is 87591661. The next prime is 87591677. The reversal of 87591671 is 17619578.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17619578 = 2 ⋅8809789.

It is a cyclic number.

It is not a de Polignac number, because 87591671 - 2⁶ = 87591607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87591677) 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, 125141 + ... + 125838.

It is an arithmetic number, because the mean of its divisors is an integer number (21960750).

Almost surely, 2^87591671 is an apocalyptic number.

87591671 is a deficient number, since it is larger than the sum of its proper divisors (251329).

87591671 is a wasteful number, since it uses less digits than its factorization.

87591671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251328.

The product of its digits is 105840, while the sum is 44.

The square root of 87591671 is about 9359.0422052687. The cubic root of 87591671 is about 444.1069849461.

The spelling of 87591671 in words is "eighty-seven million, five hundred ninety-one thousand, six hundred seventy-one".