1269318539 has 2 divisors, whose sum is σ = 1269318540. Its totient is φ = 1269318538.

The previous prime is 1269318511. The next prime is 1269318581. The reversal of 1269318539 is 9358139621.

It is a weak prime.

It is an emirp because it is prime and its reverse (9358139621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1269318539 is a prime.

It is a super-2 number, since 2×1269318539² = 3222339106898189042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1269318493 and 1269318502.

It is not a weakly prime, because it can be changed into another prime (1269318599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634659269 + 634659270.

It is an arithmetic number, because the mean of its divisors is an integer number (634659270).

Almost surely, 2^1269318539 is an apocalyptic number.

1269318539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1269318539 is an equidigital number, since it uses as much as digits as its factorization.

1269318539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 1269318539 is about 35627.4969510910. The cubic root of 1269318539 is about 1082.7384036853.

The spelling of 1269318539 in words is "one billion, two hundred sixty-nine million, three hundred eighteen thousand, five hundred thirty-nine".