5138891 has 2 divisors, whose sum is σ = 5138892. Its totient is φ = 5138890.

The previous prime is 5138869. The next prime is 5138923. The reversal of 5138891 is 1988315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5138891 - 2¹⁸ = 4876747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5138831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2569445 + 2569446.

It is an arithmetic number, because the mean of its divisors is an integer number (2569446).

Almost surely, 2^5138891 is an apocalyptic number.

5138891 is a deficient number, since it is larger than the sum of its proper divisors (1).

5138891 is an equidigital number, since it uses as much as digits as its factorization.

5138891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 35.

The square root of 5138891 is about 2266.9122170918. The cubic root of 5138891 is about 172.5664912055.

The spelling of 5138891 in words is "five million, one hundred thirty-eight thousand, eight hundred ninety-one".