7998201791 has 8 divisors (see below), whose sum is σ = 8520597120. Its totient is φ = 7485950232.

The previous prime is 7998201749. The next prime is 7998201793. The reversal of 7998201791 is 1971028997.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7998201791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7998201793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2534315 + ... + 2537468.

It is an arithmetic number, because the mean of its divisors is an integer number (1065074640).

Almost surely, 2^7998201791 is an apocalyptic number.

7998201791 is a deficient number, since it is larger than the sum of its proper divisors (522395329).

7998201791 is a wasteful number, since it uses less digits than its factorization.

7998201791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071885.

The product of its (nonzero) digits is 571536, while the sum is 53.

The square root of 7998201791 is about 89432.6662411448. Note that the first 3 decimals coincide. The cubic root of 7998201791 is about 1999.8501380210.

The spelling of 7998201791 in words is "seven billion, nine hundred ninety-eight million, two hundred one thousand, seven hundred ninety-one".