5163781393 has 4 divisors (see below), whose sum is σ = 5163925540. Its totient is φ = 5163637248.

The previous prime is 5163781391. The next prime is 5163781397. The reversal of 5163781393 is 3931873615.

It is the 29337-th star number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3798626689 + 1365154704 = 61633^2 + 36948^2 .

It is a 3-Lehmer number, since φ(5163781393) divides (5163781393-1)³.

It is a cyclic number.

It is not a de Polignac number, because 5163781393 - 2¹ = 5163781391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5163781391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27721 + ... + 105337.

It is an arithmetic number, because the mean of its divisors is an integer number (1290981385).

Almost surely, 2^5163781393 is an apocalyptic number.

It is an amenable number.

5163781393 is a deficient number, since it is larger than the sum of its proper divisors (144147).

5163781393 is an equidigital number, since it uses as much as digits as its factorization.

5163781393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144146.

The product of its digits is 408240, while the sum is 46.

The square root of 5163781393 is about 71859.4558356797. The cubic root of 5163781393 is about 1728.4465314473.

The spelling of 5163781393 in words is "five billion, one hundred sixty-three million, seven hundred eighty-one thousand, three hundred ninety-three".