1264896439 has 2 divisors, whose sum is σ = 1264896440. Its totient is φ = 1264896438.

The previous prime is 1264896421. The next prime is 1264896449. The reversal of 1264896439 is 9346984621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1264896439 - 2¹⁷ = 1264765367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264896449) 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, 632448219 + 632448220.

It is an arithmetic number, because the mean of its divisors is an integer number (632448220).

Almost surely, 2^1264896439 is an apocalyptic number.

1264896439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264896439 is an equidigital number, since it uses as much as digits as its factorization.

1264896439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 52.

The square root of 1264896439 is about 35565.3825931902. The cubic root of 1264896439 is about 1081.4795790186.

The spelling of 1264896439 in words is "one billion, two hundred sixty-four million, eight hundred ninety-six thousand, four hundred thirty-nine".