4991326139 has 2 divisors, whose sum is σ = 4991326140. Its totient is φ = 4991326138.

The previous prime is 4991326133. The next prime is 4991326169. The reversal of 4991326139 is 9316231994.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4991326139 - 2⁸ = 4991325883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4991326093 and 4991326102.

It is not a weakly prime, because it can be changed into another prime (4991326133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2495663069 + 2495663070.

It is an arithmetic number, because the mean of its divisors is an integer number (2495663070).

Almost surely, 2^4991326139 is an apocalyptic number.

4991326139 is a deficient number, since it is larger than the sum of its proper divisors (1).

4991326139 is an equidigital number, since it uses as much as digits as its factorization.

4991326139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 47.

The square root of 4991326139 is about 70649.3180363406. The cubic root of 4991326139 is about 1708.9865680955.

The spelling of 4991326139 in words is "four billion, nine hundred ninety-one million, three hundred twenty-six thousand, one hundred thirty-nine".