7987605 has 16 divisors (see below), whose sum is σ = 12819840. Its totient is φ = 4246848.

The previous prime is 7987591. The next prime is 7987607. The reversal of 7987605 is 5067897.

It is not a de Polignac number, because 7987605 - 2⁴ = 7987589 is a prime.

7987605 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7987607) 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, 5979 + ... + 7191.

It is an arithmetic number, because the mean of its divisors is an integer number (801240).

Almost surely, 2^7987605 is an apocalyptic number.

It is an amenable number.

7987605 is a deficient number, since it is larger than the sum of its proper divisors (4832235).

7987605 is a wasteful number, since it uses less digits than its factorization.

7987605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 7987605 is about 2826.2351282227. The cubic root of 7987605 is about 199.8966549415.

The spelling of 7987605 in words is "seven million, nine hundred eighty-seven thousand, six hundred five".