1263263137 has 2 divisors, whose sum is σ = 1263263138. Its totient is φ = 1263263136.

The previous prime is 1263263093. The next prime is 1263263143. The reversal of 1263263137 is 7313623621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 749062161 + 514200976 = 27369^2 + 22676^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263263137 - 2²³ = 1254874529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263263537) 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, 631631568 + 631631569.

It is an arithmetic number, because the mean of its divisors is an integer number (631631569).

Almost surely, 2^1263263137 is an apocalyptic number.

It is an amenable number.

1263263137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263263137 is an equidigital number, since it uses as much as digits as its factorization.

1263263137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 34.

The square root of 1263263137 is about 35542.4132129488. The cubic root of 1263263137 is about 1081.0138904100.

Adding to 1263263137 its reverse (7313623621), we get a palindrome (8576886758).

The spelling of 1263263137 in words is "one billion, two hundred sixty-three million, two hundred sixty-three thousand, one hundred thirty-seven".