3128204749 has 2 divisors, whose sum is σ = 3128204750. Its totient is φ = 3128204748.

The previous prime is 3128204693. The next prime is 3128204753. The reversal of 3128204749 is 9474028213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2935689124 + 192515625 = 54182^2 + 13875^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128204749 - 2⁷ = 3128204621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3128204449) 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, 1564102374 + 1564102375.

It is an arithmetic number, because the mean of its divisors is an integer number (1564102375).

Almost surely, 2^3128204749 is an apocalyptic number.

It is an amenable number.

3128204749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128204749 is an equidigital number, since it uses as much as digits as its factorization.

3128204749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 3128204749 is about 55930.3562388083. The cubic root of 3128204749 is about 1462.5084713172.

The spelling of 3128204749 in words is "three billion, one hundred twenty-eight million, two hundred four thousand, seven hundred forty-nine".