1297136899 has 2 divisors, whose sum is σ = 1297136900. Its totient is φ = 1297136898.

The previous prime is 1297136881. The next prime is 1297136909. The reversal of 1297136899 is 9986317921.

It is a strong prime.

It is an emirp because it is prime and its reverse (9986317921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1297136899 - 2⁹ = 1297136387 is a prime.

It is a super-3 number, since 3×1297136899³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1297136809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648568449 + 648568450.

It is an arithmetic number, because the mean of its divisors is an integer number (648568450).

Almost surely, 2^1297136899 is an apocalyptic number.

1297136899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297136899 is an equidigital number, since it uses as much as digits as its factorization.

1297136899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 55.

The square root of 1297136899 is about 36015.7868024565. The cubic root of 1297136899 is about 1090.5910715619.

The spelling of 1297136899 in words is "one billion, two hundred ninety-seven million, one hundred thirty-six thousand, eight hundred ninety-nine".