8127664837 has 2 divisors, whose sum is σ = 8127664838. Its totient is φ = 8127664836.

The previous prime is 8127664817. The next prime is 8127664841. The reversal of 8127664837 is 7384667218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6869260161 + 1258404676 = 82881^2 + 35474^2 .

It is a cyclic number.

It is not a de Polignac number, because 8127664837 - 2³¹ = 5980181189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8127664817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4063832418 + 4063832419.

It is an arithmetic number, because the mean of its divisors is an integer number (4063832419).

Almost surely, 2^8127664837 is an apocalyptic number.

It is an amenable number.

8127664837 is a deficient number, since it is larger than the sum of its proper divisors (1).

8127664837 is an equidigital number, since it uses as much as digits as its factorization.

8127664837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 52.

The square root of 8127664837 is about 90153.5625308285. The cubic root of 8127664837 is about 2010.5826415016.

The spelling of 8127664837 in words is "eight billion, one hundred twenty-seven million, six hundred sixty-four thousand, eight hundred thirty-seven".