86481987 has 16 divisors (see below), whose sum is σ = 121186560. Its totient is φ = 54788832.

The previous prime is 86481961. The next prime is 86481991. The reversal of 86481987 is 78918468.

It is not a de Polignac number, because 86481987 - 2¹² = 86477891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86481287) 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 15 ways as a sum of consecutive naturals, for example, 4287 + ... + 13832.

It is an arithmetic number, because the mean of its divisors is an integer number (7574160).

Almost surely, 2^86481987 is an apocalyptic number.

86481987 is a deficient number, since it is larger than the sum of its proper divisors (34704573).

86481987 is a wasteful number, since it uses less digits than its factorization.

86481987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18202.

The product of its digits is 774144, while the sum is 51.

The square root of 86481987 is about 9299.5691835697. The cubic root of 86481987 is about 442.2235702083.

The spelling of 86481987 in words is "eighty-six million, four hundred eighty-one thousand, nine hundred eighty-seven".