1288876399 has 2 divisors, whose sum is σ = 1288876400. Its totient is φ = 1288876398.

The previous prime is 1288876397. The next prime is 1288876411. The reversal of 1288876399 is 9936788821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1288876399 - 2¹ = 1288876397 is a prime.

It is a super-2 number, since 2×1288876399² = 3322404743798414402, which contains 22 as substring.

Together with 1288876397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1288876397) 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, 644438199 + 644438200.

It is an arithmetic number, because the mean of its divisors is an integer number (644438200).

Almost surely, 2^1288876399 is an apocalyptic number.

1288876399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288876399 is an equidigital number, since it uses as much as digits as its factorization.

1288876399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 61.

The square root of 1288876399 is about 35900.9247652480. The cubic root of 1288876399 is about 1088.2710853917.

The spelling of 1288876399 in words is "one billion, two hundred eighty-eight million, eight hundred seventy-six thousand, three hundred ninety-nine".