9991313241 has 64 divisors (see below), whose sum is σ = 16942829568. Its totient is φ = 5096141568.

The previous prime is 9991313239. The next prime is 9991313257. The reversal of 9991313241 is 1423131999.

It is not a de Polignac number, because 9991313241 - 2¹ = 9991313239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9991313193 and 9991313202.

It is not an unprimeable number, because it can be changed into a prime (9991313291) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1683906 + ... + 1689828.

It is an arithmetic number, because the mean of its divisors is an integer number (264731712).

Almost surely, 2^9991313241 is an apocalyptic number.

9991313241 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9991313241 is a deficient number, since it is larger than the sum of its proper divisors (6951516327).

9991313241 is a wasteful number, since it uses less digits than its factorization.

9991313241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6150.

The product of its digits is 52488, while the sum is 42.

The square root of 9991313241 is about 99956.5567684282. The cubic root of 9991313241 is about 2153.8106741433.

The spelling of 9991313241 in words is "nine billion, nine hundred ninety-one million, three hundred thirteen thousand, two hundred forty-one".