1267449913 has 2 divisors, whose sum is σ = 1267449914. Its totient is φ = 1267449912.

The previous prime is 1267449907. The next prime is 1267449919. The reversal of 1267449913 is 3199447621.

It is a balanced prime because it is at equal distance from previous prime (1267449907) and next prime (1267449919).

It can be written as a sum of positive squares in only one way, i.e., 1253372409 + 14077504 = 35403^2 + 3752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1267449913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1267449919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633724956 + 633724957.

It is an arithmetic number, because the mean of its divisors is an integer number (633724957).

Almost surely, 2^1267449913 is an apocalyptic number.

It is an amenable number.

1267449913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267449913 is an equidigital number, since it uses as much as digits as its factorization.

1267449913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 1267449913 is about 35601.2628006367. The cubic root of 1267449913 is about 1082.2068253314.

The spelling of 1267449913 in words is "one billion, two hundred sixty-seven million, four hundred forty-nine thousand, nine hundred thirteen".