8239051813 has 2 divisors, whose sum is σ = 8239051814. Its totient is φ = 8239051812.

The previous prime is 8239051801. The next prime is 8239051831. The reversal of 8239051813 is 3181509328.

Together with next prime (8239051831) 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., 6861305889 + 1377745924 = 82833^2 + 37118^2 .

It is a cyclic number.

It is not a de Polignac number, because 8239051813 - 2¹³ = 8239043621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8239052813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4119525906 + 4119525907.

It is an arithmetic number, because the mean of its divisors is an integer number (4119525907).

Almost surely, 2^8239051813 is an apocalyptic number.

It is an amenable number.

8239051813 is a deficient number, since it is larger than the sum of its proper divisors (1).

8239051813 is an equidigital number, since it uses as much as digits as its factorization.

8239051813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 8239051813 is about 90769.2228291066. Note that the first 3 decimals coincide. The cubic root of 8239051813 is about 2019.7257913740.

The spelling of 8239051813 in words is "eight billion, two hundred thirty-nine million, fifty-one thousand, eight hundred thirteen".