8126749 has 2 divisors, whose sum is σ = 8126750. Its totient is φ = 8126748.

The previous prime is 8126747. The next prime is 8126773. The reversal of 8126749 is 9476218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8082649 + 44100 = 2843^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 8126749 - 2¹ = 8126747 is a prime.

Together with 8126747, 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 (8126747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4063374 + 4063375.

It is an arithmetic number, because the mean of its divisors is an integer number (4063375).

Almost surely, 2^8126749 is an apocalyptic number.

It is an amenable number.

8126749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8126749 is an equidigital number, since it uses as much as digits as its factorization.

8126749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 8126749 is about 2850.7453411345. The cubic root of 8126749 is about 201.0507120214.

The spelling of 8126749 in words is "eight million, one hundred twenty-six thousand, seven hundred forty-nine".