8369129891 has 2 divisors, whose sum is σ = 8369129892. Its totient is φ = 8369129890.

The previous prime is 8369129837. The next prime is 8369129917. The reversal of 8369129891 is 1989219638.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8369129891 - 2¹⁴ = 8369113507 is a prime.

It is not a weakly prime, because it can be changed into another prime (8369129191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4184564945 + 4184564946.

It is an arithmetic number, because the mean of its divisors is an integer number (4184564946).

Almost surely, 2^8369129891 is an apocalyptic number.

8369129891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8369129891 is an equidigital number, since it uses as much as digits as its factorization.

8369129891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 56.

The square root of 8369129891 is about 91482.9486352511. The cubic root of 8369129891 is about 2030.2994770384.

The spelling of 8369129891 in words is "eight billion, three hundred sixty-nine million, one hundred twenty-nine thousand, eight hundred ninety-one".