1267913489 has 2 divisors, whose sum is σ = 1267913490. Its totient is φ = 1267913488.

The previous prime is 1267913467. The next prime is 1267913539. The reversal of 1267913489 is 9843197621.

It is an a-pointer prime, because the next prime (1267913539) can be obtained adding 1267913489 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1198890625 + 69022864 = 34625^2 + 8308^2 .

It is a cyclic number.

It is not a de Polignac number, because 1267913489 - 2¹⁶ = 1267847953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1267913419) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633956744 + 633956745.

It is an arithmetic number, because the mean of its divisors is an integer number (633956745).

Almost surely, 2^1267913489 is an apocalyptic number.

It is an amenable number.

1267913489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267913489 is an equidigital number, since it uses as much as digits as its factorization.

1267913489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 1267913489 is about 35607.7728733489. The cubic root of 1267913489 is about 1082.3387500605.

The spelling of 1267913489 in words is "one billion, two hundred sixty-seven million, nine hundred thirteen thousand, four hundred eighty-nine".