8251934389 has 2 divisors, whose sum is σ = 8251934390. Its totient is φ = 8251934388.

The previous prime is 8251934387. The next prime is 8251934401. The reversal of 8251934389 is 9834391528.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8110443364 + 141491025 = 90058^2 + 11895^2 .

It is a cyclic number.

It is not a de Polignac number, because 8251934389 - 2¹ = 8251934387 is a prime.

Together with 8251934387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8251934387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4125967194 + 4125967195.

It is an arithmetic number, because the mean of its divisors is an integer number (4125967195).

Almost surely, 2^8251934389 is an apocalyptic number.

It is an amenable number.

8251934389 is a deficient number, since it is larger than the sum of its proper divisors (1).

8251934389 is an equidigital number, since it uses as much as digits as its factorization.

8251934389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 52.

The square root of 8251934389 is about 90840.1584597913. The cubic root of 8251934389 is about 2020.7779238332. Note that the first 3 decimals are identical.

The spelling of 8251934389 in words is "eight billion, two hundred fifty-one million, nine hundred thirty-four thousand, three hundred eighty-nine".