87982609 has 12 divisors (see below), whose sum is σ = 104149108. Its totient is φ = 73830240.

The previous prime is 87982603. The next prime is 87982621. The reversal of 87982609 is 90628978.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15681600 + 72301009 = 3960^2 + 8503^2 .

It is not a de Polignac number, because 87982609 - 2⁷ = 87982481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87982603) 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 11 ways as a sum of consecutive naturals, for example, 26394 + ... + 29539.

Almost surely, 2^87982609 is an apocalyptic number.

It is an amenable number.

87982609 is a deficient number, since it is larger than the sum of its proper divisors (16166499).

87982609 is a wasteful number, since it uses less digits than its factorization.

87982609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55968 (or 55957 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 87982609 is about 9379.9045304310. The cubic root of 87982609 is about 444.7667152458.

The spelling of 87982609 in words is "eighty-seven million, nine hundred eighty-two thousand, six hundred nine".