7993985 has 8 divisors (see below), whose sum is σ = 9631656. Its totient is φ = 6369280.

The previous prime is 7993967. The next prime is 7993987. The reversal of 7993985 is 5893997.

It can be written as a sum of positive squares in 4 ways, for example, as 982081 + 7011904 = 991^2 + 2648^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7993985 - 2²² = 3799681 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (7993987) 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 7 ways as a sum of consecutive naturals, for example, 1826 + ... + 4395.

It is an arithmetic number, because the mean of its divisors is an integer number (1203957).

Almost surely, 2^7993985 is an apocalyptic number.

It is an amenable number.

7993985 is a deficient number, since it is larger than the sum of its proper divisors (1637671).

7993985 is a wasteful number, since it uses less digits than its factorization.

7993985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483.

The product of its digits is 612360, while the sum is 50.

The square root of 7993985 is about 2827.3636129794. The cubic root of 7993985 is about 199.9498624322.

The spelling of 7993985 in words is "seven million, nine hundred ninety-three thousand, nine hundred eighty-five".