2528391391 has 2 divisors, whose sum is σ = 2528391392. Its totient is φ = 2528391390.

The previous prime is 2528391377. The next prime is 2528391433. The reversal of 2528391391 is 1931938252.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2528391391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2528391191) 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, 1264195695 + 1264195696.

It is an arithmetic number, because the mean of its divisors is an integer number (1264195696).

Almost surely, 2^2528391391 is an apocalyptic number.

2528391391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2528391391 is an equidigital number, since it uses as much as digits as its factorization.

2528391391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 2528391391 is about 50283.1123837815. The cubic root of 2528391391 is about 1362.3272205338.

The spelling of 2528391391 in words is "two billion, five hundred twenty-eight million, three hundred ninety-one thousand, three hundred ninety-one".