4991113331 has 2 divisors, whose sum is σ = 4991113332. Its totient is φ = 4991113330.

The previous prime is 4991113313. The next prime is 4991113399. The reversal of 4991113331 is 1333111994.

Together with previous prime (4991113313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4991113331 - 2¹⁰ = 4991112307 is a prime.

It is a super-2 number, since 2×4991113331² = 49822424565771831122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4991113291 and 4991113300.

It is not a weakly prime, because it can be changed into another prime (4991113531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2495556665 + 2495556666.

It is an arithmetic number, because the mean of its divisors is an integer number (2495556666).

Almost surely, 2^4991113331 is an apocalyptic number.

4991113331 is a deficient number, since it is larger than the sum of its proper divisors (1).

4991113331 is an equidigital number, since it uses as much as digits as its factorization.

4991113331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 35.

The square root of 4991113331 is about 70647.8119335624. The cubic root of 4991113331 is about 1708.9622798821.

The spelling of 4991113331 in words is "four billion, nine hundred ninety-one million, one hundred thirteen thousand, three hundred thirty-one".