8427667249 has 2 divisors, whose sum is σ = 8427667250. Its totient is φ = 8427667248.

The previous prime is 8427667247. The next prime is 8427667253. The reversal of 8427667249 is 9427667248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6779875600 + 1647791649 = 82340^2 + 40593^2 .

It is a cyclic number.

It is not a de Polignac number, because 8427667249 - 2¹ = 8427667247 is a prime.

Together with 8427667247, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8427667249.

It is not a weakly prime, because it can be changed into another prime (8427667247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4213833624 + 4213833625.

It is an arithmetic number, because the mean of its divisors is an integer number (4213833625).

Almost surely, 2^8427667249 is an apocalyptic number.

It is an amenable number.

8427667249 is a deficient number, since it is larger than the sum of its proper divisors (1).

8427667249 is an equidigital number, since it uses as much as digits as its factorization.

8427667249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 55.

The square root of 8427667249 is about 91802.3270347762. The cubic root of 8427667249 is about 2035.0220845299.

Subtracting 8427667249 from its reverse (9427667248), we obtain a palindrome (999999999).

It can be divided in two parts, 84276 and 67249, that added together give a triangular number (151525 = T₅₅₀).

The spelling of 8427667249 in words is "eight billion, four hundred twenty-seven million, six hundred sixty-seven thousand, two hundred forty-nine".