87869871 has 6 divisors (see below), whose sum is σ = 126923160. Its totient is φ = 58579908.

The previous prime is 87869869. The next prime is 87869891. The reversal of 87869871 is 17896878.

It is not a de Polignac number, because 87869871 - 2¹ = 87869869 is a prime.

It is a super-2 number, since 2×87869871² = 15442228459113282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87869891) 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, 4881651 + ... + 4881668.

It is an arithmetic number, because the mean of its divisors is an integer number (21153860).

Almost surely, 2^87869871 is an apocalyptic number.

87869871 is a deficient number, since it is larger than the sum of its proper divisors (39053289).

87869871 is a wasteful number, since it uses less digits than its factorization.

87869871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9763325 (or 9763322 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 87869871 is about 9373.8930546492. The cubic root of 87869871 is about 444.5766642702.

The spelling of 87869871 in words is "eighty-seven million, eight hundred sixty-nine thousand, eight hundred seventy-one".