7998811 has 4 divisors (see below), whose sum is σ = 8016624. Its totient is φ = 7981000.

The previous prime is 7998803. The next prime is 7998827. The reversal of 7998811 is 1188997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1188997 = 17 ⋅69941.

It is a cyclic number.

It is not a de Polignac number, because 7998811 - 2³ = 7998803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7998511) 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 3 ways as a sum of consecutive naturals, for example, 8215 + ... + 9136.

It is an arithmetic number, because the mean of its divisors is an integer number (2004156).

Almost surely, 2^7998811 is an apocalyptic number.

7998811 is a deficient number, since it is larger than the sum of its proper divisors (17813).

7998811 is a wasteful number, since it uses less digits than its factorization.

7998811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17812.

The product of its digits is 36288, while the sum is 43.

The square root of 7998811 is about 2828.2169294451. The cubic root of 7998811 is about 199.9900911758.

The spelling of 7998811 in words is "seven million, nine hundred ninety-eight thousand, eight hundred eleven".