1263898453 has 2 divisors, whose sum is σ = 1263898454. Its totient is φ = 1263898452.

The previous prime is 1263898423. The next prime is 1263898459. The reversal of 1263898453 is 3548983621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1003495684 + 260402769 = 31678^2 + 16137^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263898453 - 2¹⁷ = 1263767381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1263898397 and 1263898406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263898459) 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, 631949226 + 631949227.

It is an arithmetic number, because the mean of its divisors is an integer number (631949227).

Almost surely, 2^1263898453 is an apocalyptic number.

It is an amenable number.

1263898453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263898453 is an equidigital number, since it uses as much as digits as its factorization.

1263898453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 49.

The square root of 1263898453 is about 35551.3495243148. The cubic root of 1263898453 is about 1081.1950799819.

The spelling of 1263898453 in words is "one billion, two hundred sixty-three million, eight hundred ninety-eight thousand, four hundred fifty-three".