8261398337 has 2 divisors, whose sum is σ = 8261398338. Its totient is φ = 8261398336.

The previous prime is 8261398283. The next prime is 8261398339. The reversal of 8261398337 is 7338931628.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6470754481 + 1790643856 = 80441^2 + 42316^2 .

It is a cyclic number.

It is not a de Polignac number, because 8261398337 - 2²⁸ = 7992962881 is a prime.

Together with 8261398339, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8261398339) 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, 4130699168 + 4130699169.

It is an arithmetic number, because the mean of its divisors is an integer number (4130699169).

Almost surely, 2^8261398337 is an apocalyptic number.

It is an amenable number.

8261398337 is a deficient number, since it is larger than the sum of its proper divisors (1).

8261398337 is an equidigital number, since it uses as much as digits as its factorization.

8261398337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 50.

The square root of 8261398337 is about 90892.2347453290. The cubic root of 8261398337 is about 2021.5501561278.

The spelling of 8261398337 in words is "eight billion, two hundred sixty-one million, three hundred ninety-eight thousand, three hundred thirty-seven".