7990817 has 8 divisors (see below), whose sum is σ = 8208552. Its totient is φ = 7776000.

The previous prime is 7990813. The next prime is 7990823. The reversal of 7990817 is 7180997.

It can be written as a sum of positive squares in 4 ways, for example, as 3701776 + 4289041 = 1924^2 + 2071^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7990817 - 2² = 7990813 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7990813) 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, 5513 + ... + 6809.

It is an arithmetic number, because the mean of its divisors is an integer number (1026069).

Almost surely, 2^7990817 is an apocalyptic number.

It is an amenable number.

7990817 is a deficient number, since it is larger than the sum of its proper divisors (217735).

7990817 is a wasteful number, since it uses less digits than its factorization.

7990817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 7990817 is about 2826.8033182378. The cubic root of 7990817 is about 199.9234457009.

The spelling of 7990817 in words is "seven million, nine hundred ninety thousand, eight hundred seventeen".