3128807497 has 2 divisors, whose sum is σ = 3128807498. Its totient is φ = 3128807496.

The previous prime is 3128807491. The next prime is 3128807519. The reversal of 3128807497 is 7947088213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1927561216 + 1201246281 = 43904^2 + 34659^2 .

It is an emirp because it is prime and its reverse (7947088213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3128807497 - 2³ = 3128807489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3128807497.

It is not a weakly prime, because it can be changed into another prime (3128807491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564403748 + 1564403749.

It is an arithmetic number, because the mean of its divisors is an integer number (1564403749).

Almost surely, 2^3128807497 is an apocalyptic number.

It is an amenable number.

3128807497 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128807497 is an equidigital number, since it uses as much as digits as its factorization.

3128807497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 3128807497 is about 55935.7443590411. The cubic root of 3128807497 is about 1462.6023981874.

The spelling of 3128807497 in words is "three billion, one hundred twenty-eight million, eight hundred seven thousand, four hundred ninety-seven".