7987345 has 4 divisors (see below), whose sum is σ = 9584820. Its totient is φ = 6389872.

The previous prime is 7987327. The next prime is 7987351. The reversal of 7987345 is 5437897.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5349969 + 2637376 = 2313^2 + 1624^2 .

It is a cyclic number.

It is not a de Polignac number, because 7987345 - 2⁵ = 7987313 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 798730 + ... + 798739.

It is an arithmetic number, because the mean of its divisors is an integer number (2396205).

Almost surely, 2^7987345 is an apocalyptic number.

It is an amenable number.

7987345 is a deficient number, since it is larger than the sum of its proper divisors (1597475).

7987345 is a wasteful number, since it uses less digits than its factorization.

7987345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597474.

The product of its digits is 211680, while the sum is 43.

The square root of 7987345 is about 2826.1891302600. The cubic root of 7987345 is about 199.8944860104.

The spelling of 7987345 in words is "seven million, nine hundred eighty-seven thousand, three hundred forty-five".