87499881 has 12 divisors (see below), whose sum is σ = 144444352. Its totient is φ = 49999896.

The previous prime is 87499879. The next prime is 87499897. The reversal of 87499881 is 18899478.

It is not a de Polignac number, because 87499881 - 2¹ = 87499879 is a prime.

It is a super-2 number, since 2×87499881² = 15312458350028322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87499861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 694381 + ... + 694506.

Almost surely, 2^87499881 is an apocalyptic number.

It is an amenable number.

87499881 is a deficient number, since it is larger than the sum of its proper divisors (56944471).

87499881 is a wasteful number, since it uses less digits than its factorization.

87499881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388900 (or 1388897 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 87499881 is about 9354.1371061151. The cubic root of 87499881 is about 443.9517996130.

The spelling of 87499881 in words is "eighty-seven million, four hundred ninety-nine thousand, eight hundred eighty-one".