1263429449 has 2 divisors, whose sum is σ = 1263429450. Its totient is φ = 1263429448.

The previous prime is 1263429439. The next prime is 1263429487. The reversal of 1263429449 is 9449243621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1213825600 + 49603849 = 34840^2 + 7043^2 .

It is an emirp because it is prime and its reverse (9449243621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263429449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263429439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631714724 + 631714725.

It is an arithmetic number, because the mean of its divisors is an integer number (631714725).

Almost surely, 2^1263429449 is an apocalyptic number.

It is an amenable number.

1263429449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263429449 is an equidigital number, since it uses as much as digits as its factorization.

1263429449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 44.

The square root of 1263429449 is about 35544.7527632420. The cubic root of 1263429449 is about 1081.0613277933.

The spelling of 1263429449 in words is "one billion, two hundred sixty-three million, four hundred twenty-nine thousand, four hundred forty-nine".