6427133749 has 2 divisors, whose sum is σ = 6427133750. Its totient is φ = 6427133748.

The previous prime is 6427133707. The next prime is 6427133753. The reversal of 6427133749 is 9473317246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4154704849 + 2272428900 = 64457^2 + 47670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6427133749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6427133699 and 6427133708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6427131749) 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, 3213566874 + 3213566875.

It is an arithmetic number, because the mean of its divisors is an integer number (3213566875).

Almost surely, 2^6427133749 is an apocalyptic number.

It is an amenable number.

6427133749 is a deficient number, since it is larger than the sum of its proper divisors (1).

6427133749 is an equidigital number, since it uses as much as digits as its factorization.

6427133749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 46.

The square root of 6427133749 is about 80169.4065650981. The cubic root of 6427133749 is about 1859.2556613355.

The spelling of 6427133749 in words is "six billion, four hundred twenty-seven million, one hundred thirty-three thousand, seven hundred forty-nine".