7991398363 has 8 divisors (see below), whose sum is σ = 8609655600. Its totient is φ = 7373646048.

The previous prime is 7991398291. The next prime is 7991398379. The reversal of 7991398363 is 3638931997.

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-7991398363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7991398298 and 7991398307.

It is not an unprimeable number, because it can be changed into a prime (7991398463) 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, 93028 + ... + 156961.

It is an arithmetic number, because the mean of its divisors is an integer number (1076206950).

Almost surely, 2^7991398363 is an apocalyptic number.

7991398363 is a deficient number, since it is larger than the sum of its proper divisors (618257237).

7991398363 is a wasteful number, since it uses less digits than its factorization.

7991398363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252461.

The product of its digits is 6613488, while the sum is 58.

The square root of 7991398363 is about 89394.6215552144. The cubic root of 7991398363 is about 1999.2829398598.

The spelling of 7991398363 in words is "seven billion, nine hundred ninety-one million, three hundred ninety-eight thousand, three hundred sixty-three".