5136813991 has 2 divisors, whose sum is σ = 5136813992. Its totient is φ = 5136813990.

The previous prime is 5136813967. The next prime is 5136814009. The reversal of 5136813991 is 1993186315.

5136813991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5136813991 - 2³¹ = 2989330343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5136813931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2568406995 + 2568406996.

It is an arithmetic number, because the mean of its divisors is an integer number (2568406996).

Almost surely, 2^5136813991 is an apocalyptic number.

5136813991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5136813991 is an equidigital number, since it uses as much as digits as its factorization.

5136813991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 46.

The square root of 5136813991 is about 71671.5703120840. The cubic root of 5136813991 is about 1725.4323907741.

The spelling of 5136813991 in words is "five billion, one hundred thirty-six million, eight hundred thirteen thousand, nine hundred ninety-one".