7991369 has 2 divisors, whose sum is σ = 7991370. Its totient is φ = 7991368.

The previous prime is 7991341. The next prime is 7991407. The reversal of 7991369 is 9631997.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7912969 + 78400 = 2813^2 + 280^2 .

It is an emirp because it is prime and its reverse (9631997) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7991369 is a prime.

It is a super-2 number, since 2×7991369² = 127723956988322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7991329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3995684 + 3995685.

It is an arithmetic number, because the mean of its divisors is an integer number (3995685).

Almost surely, 2^7991369 is an apocalyptic number.

It is an amenable number.

7991369 is a deficient number, since it is larger than the sum of its proper divisors (1).

7991369 is an equidigital number, since it uses as much as digits as its factorization.

7991369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854, while the sum is 44.

The square root of 7991369 is about 2826.9009533410. The cubic root of 7991369 is about 199.9280491185.

The spelling of 7991369 in words is "seven million, nine hundred ninety-one thousand, three hundred sixty-nine".