1263344129 has 2 divisors, whose sum is σ = 1263344130. Its totient is φ = 1263344128.

The previous prime is 1263344113. The next prime is 1263344153. The reversal of 1263344129 is 9214433621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1240800625 + 22543504 = 35225^2 + 4748^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263344129 - 2⁴ = 1263344113 is a prime.

It is a super-3 number, since 3×1263344129³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1263344629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631672064 + 631672065.

It is an arithmetic number, because the mean of its divisors is an integer number (631672065).

Almost surely, 2^1263344129 is an apocalyptic number.

It is an amenable number.

1263344129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263344129 is an equidigital number, since it uses as much as digits as its factorization.

1263344129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 1263344129 is about 35543.5525658311. The cubic root of 1263344129 is about 1081.0369923813.

The spelling of 1263344129 in words is "one billion, two hundred sixty-three million, three hundred forty-four thousand, one hundred twenty-nine".