7991359 has 4 divisors (see below), whose sum is σ = 8020080. Its totient is φ = 7962640.

The previous prime is 7991341. The next prime is 7991369. The reversal of 7991359 is 9531997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9531997 = 53 ⋅179849.

It is a cyclic number.

It is not a de Polignac number, because 7991359 - 2⁷ = 7991231 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7991329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13939 + ... + 14500.

It is an arithmetic number, because the mean of its divisors is an integer number (2005020).

Almost surely, 2^7991359 is an apocalyptic number.

7991359 is a deficient number, since it is larger than the sum of its proper divisors (28721).

7991359 is a wasteful number, since it uses less digits than its factorization.

7991359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28720.

The product of its digits is 76545, while the sum is 43.

The square root of 7991359 is about 2826.8991846191. The cubic root of 7991359 is about 199.9279657251.

The spelling of 7991359 in words is "seven million, nine hundred ninety-one thousand, three hundred fifty-nine".