1263161239 has 2 divisors, whose sum is σ = 1263161240. Its totient is φ = 1263161238.

The previous prime is 1263161233. The next prime is 1263161279. The reversal of 1263161239 is 9321613621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1263161239 - 2³ = 1263161231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263161231) 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, 631580619 + 631580620.

It is an arithmetic number, because the mean of its divisors is an integer number (631580620).

Almost surely, 2^1263161239 is an apocalyptic number.

1263161239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263161239 is an equidigital number, since it uses as much as digits as its factorization.

1263161239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 1263161239 is about 35540.9797135645. The cubic root of 1263161239 is about 1080.9848238569.

The spelling of 1263161239 in words is "one billion, two hundred sixty-three million, one hundred sixty-one thousand, two hundred thirty-nine".