2528761997 has 2 divisors, whose sum is σ = 2528761998. Its totient is φ = 2528761996.

The previous prime is 2528761957. The next prime is 2528762011. The reversal of 2528761997 is 7991678252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2205805156 + 322956841 = 46966^2 + 17971^2 .

It is a cyclic number.

It is not a de Polignac number, because 2528761997 - 2¹² = 2528757901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2528761957) 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, 1264380998 + 1264380999.

It is an arithmetic number, because the mean of its divisors is an integer number (1264380999).

Almost surely, 2^2528761997 is an apocalyptic number.

It is an amenable number.

2528761997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2528761997 is an equidigital number, since it uses as much as digits as its factorization.

2528761997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 56.

The square root of 2528761997 is about 50286.7974422711. The cubic root of 2528761997 is about 1362.3937795823.

The spelling of 2528761997 in words is "two billion, five hundred twenty-eight million, seven hundred sixty-one thousand, nine hundred ninety-seven".