8391176449 has 2 divisors, whose sum is σ = 8391176450. Its totient is φ = 8391176448.

The previous prime is 8391176407. The next prime is 8391176467. The reversal of 8391176449 is 9446711938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6541574400 + 1849602049 = 80880^2 + 43007^2 .

It is a cyclic number.

It is not a de Polignac number, because 8391176449 - 2¹¹ = 8391174401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8391176396 and 8391176405.

It is not a weakly prime, because it can be changed into another prime (8391176249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4195588224 + 4195588225.

It is an arithmetic number, because the mean of its divisors is an integer number (4195588225).

Almost surely, 2^8391176449 is an apocalyptic number.

It is an amenable number.

8391176449 is a deficient number, since it is larger than the sum of its proper divisors (1).

8391176449 is an equidigital number, since it uses as much as digits as its factorization.

8391176449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 8391176449 is about 91603.3648344863. The cubic root of 8391176449 is about 2032.0807003704.

The spelling of 8391176449 in words is "eight billion, three hundred ninety-one million, one hundred seventy-six thousand, four hundred forty-nine".