7944005 has 4 divisors (see below), whose sum is σ = 9532812. Its totient is φ = 6355200.

The previous prime is 7943983. The next prime is 7944017. The reversal of 7944005 is 5004497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5004497 = 107 ⋅46771.

It can be written as a sum of positive squares in 2 ways, for example, as 1723969 + 6220036 = 1313^2 + 2494^2 .

It is not a de Polignac number, because 7944005 - 2¹² = 7939909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 794396 + ... + 794405.

It is an arithmetic number, because the mean of its divisors is an integer number (2383203).

Almost surely, 2^7944005 is an apocalyptic number.

It is an amenable number.

7944005 is a deficient number, since it is larger than the sum of its proper divisors (1588807).

7944005 is a wasteful number, since it uses less digits than its factorization.

7944005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588806.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 7944005 is about 2818.5111317857. The cubic root of 7944005 is about 199.5322820523.

The spelling of 7944005 in words is "seven million, nine hundred forty-four thousand, five".