82387987 has 16 divisors (see below), whose sum is σ = 93173760. Its totient is φ = 72172800.

The previous prime is 82387979. The next prime is 82387999. The reversal of 82387987 is 78978328.

It is a cyclic number.

It is not a de Polignac number, because 82387987 - 2³ = 82387979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82387087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122083 + ... + 122755.

It is an arithmetic number, because the mean of its divisors is an integer number (5823360).

Almost surely, 2^82387987 is an apocalyptic number.

82387987 is a deficient number, since it is larger than the sum of its proper divisors (10785773).

82387987 is a wasteful number, since it uses less digits than its factorization.

82387987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074.

The product of its digits is 1354752, while the sum is 52.

The square root of 82387987 is about 9076.7828551751. The cubic root of 82387987 is about 435.1322749188.

The spelling of 82387987 in words is "eighty-two million, three hundred eighty-seven thousand, nine hundred eighty-seven".