5386972781 has 2 divisors, whose sum is σ = 5386972782. Its totient is φ = 5386972780.

The previous prime is 5386972771. The next prime is 5386972817. The reversal of 5386972781 is 1872796835.

Together with next prime (5386972817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3577236100 + 1809736681 = 59810^2 + 42541^2 .

It is a cyclic number.

It is not a de Polignac number, because 5386972781 - 2¹⁰ = 5386971757 is a prime.

It is a super-2 number, since 2×5386972781² = 58038951486469747922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5386972711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2693486390 + 2693486391.

It is an arithmetic number, because the mean of its divisors is an integer number (2693486391).

Almost surely, 2^5386972781 is an apocalyptic number.

It is an amenable number.

5386972781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5386972781 is an equidigital number, since it uses as much as digits as its factorization.

5386972781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 56.

The square root of 5386972781 is about 73395.9997615674. Note that the first 3 decimals coincide. The cubic root of 5386972781 is about 1752.9986987771.

The spelling of 5386972781 in words is "five billion, three hundred eighty-six million, nine hundred seventy-two thousand, seven hundred eighty-one".