1264947329 has 2 divisors, whose sum is σ = 1264947330. Its totient is φ = 1264947328.

The previous prime is 1264947269. The next prime is 1264947347. The reversal of 1264947329 is 9237494621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814531600 + 450415729 = 28540^2 + 21223^2 .

It is an emirp because it is prime and its reverse (9237494621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1264947329 - 2¹² = 1264943233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264947389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632473664 + 632473665.

It is an arithmetic number, because the mean of its divisors is an integer number (632473665).

Almost surely, 2^1264947329 is an apocalyptic number.

It is an amenable number.

1264947329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264947329 is an equidigital number, since it uses as much as digits as its factorization.

1264947329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The square root of 1264947329 is about 35566.0980288814. The cubic root of 1264947329 is about 1081.4940823819.

The spelling of 1264947329 in words is "one billion, two hundred sixty-four million, nine hundred forty-seven thousand, three hundred twenty-nine".