87158671 has 4 divisors (see below), whose sum is σ = 88057312. Its totient is φ = 86260032.

The previous prime is 87158663. The next prime is 87158741. The reversal of 87158671 is 17685178.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87158671 - 2³ = 87158663 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 (87158641) 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 3 ways as a sum of consecutive naturals, for example, 449175 + ... + 449368.

It is an arithmetic number, because the mean of its divisors is an integer number (22014328).

Almost surely, 2^87158671 is an apocalyptic number.

87158671 is a deficient number, since it is larger than the sum of its proper divisors (898641).

87158671 is an equidigital number, since it uses as much as digits as its factorization.

87158671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898640.

The product of its digits is 94080, while the sum is 43.

The square root of 87158671 is about 9335.8808368573. The cubic root of 87158671 is about 443.3739774045.

The spelling of 87158671 in words is "eighty-seven million, one hundred fifty-eight thousand, six hundred seventy-one".