7991299 has 4 divisors (see below), whose sum is σ = 7998736. Its totient is φ = 7983864.

The previous prime is 7991257. The next prime is 7991303. The reversal of 7991299 is 9921997.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7991299 - 2¹¹ = 7989251 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (7991209) by changing a digit.

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, 1764 + ... + 4369.

It is an arithmetic number, because the mean of its divisors is an integer number (1999684).

Almost surely, 2^7991299 is an apocalyptic number.

7991299 is a deficient number, since it is larger than the sum of its proper divisors (7437).

7991299 is a wasteful number, since it uses less digits than its factorization.

7991299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7436.

The product of its digits is 91854, while the sum is 46.

The square root of 7991299 is about 2826.8885722646. Note that the first 3 decimals coincide. The cubic root of 7991299 is about 199.9274653635.

It can be divided in two parts, 79 and 91299, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 7991299 in words is "seven million, nine hundred ninety-one thousand, two hundred ninety-nine".