8236136869 has 2 divisors, whose sum is σ = 8236136870. Its totient is φ = 8236136868.

The previous prime is 8236136849. The next prime is 8236136899. The reversal of 8236136869 is 9686316328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7645403844 + 590733025 = 87438^2 + 24305^2 .

It is a cyclic number.

It is not a de Polignac number, because 8236136869 - 2⁹ = 8236136357 is a prime.

It is a super-2 number, since 2×8236136869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8236136849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4118068434 + 4118068435.

It is an arithmetic number, because the mean of its divisors is an integer number (4118068435).

Almost surely, 2^8236136869 is an apocalyptic number.

It is an amenable number.

8236136869 is a deficient number, since it is larger than the sum of its proper divisors (1).

8236136869 is an equidigital number, since it uses as much as digits as its factorization.

8236136869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 52.

The square root of 8236136869 is about 90753.1645123188. The cubic root of 8236136869 is about 2019.4875729414.

The spelling of 8236136869 in words is "eight billion, two hundred thirty-six million, one hundred thirty-six thousand, eight hundred sixty-nine".