1267985099 has 2 divisors, whose sum is σ = 1267985100. Its totient is φ = 1267985098.

The previous prime is 1267985087. The next prime is 1267985111. The reversal of 1267985099 is 9905897621.

It is a balanced prime because it is at equal distance from previous prime (1267985087) and next prime (1267985111).

It is a cyclic number.

It is not a de Polignac number, because 1267985099 - 2⁸ = 1267984843 is a prime.

It is a super-2 number, since 2×1267985099² = 3215572422572079602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1267985029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633992549 + 633992550.

It is an arithmetic number, because the mean of its divisors is an integer number (633992550).

Almost surely, 2^1267985099 is an apocalyptic number.

1267985099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267985099 is an equidigital number, since it uses as much as digits as its factorization.

1267985099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The square root of 1267985099 is about 35608.7783980299. The cubic root of 1267985099 is about 1082.3591260087.

The spelling of 1267985099 in words is "one billion, two hundred sixty-seven million, nine hundred eighty-five thousand, ninety-nine".