1297909799 has 2 divisors, whose sum is σ = 1297909800. Its totient is φ = 1297909798.

The previous prime is 1297909793. The next prime is 1297909801. The reversal of 1297909799 is 9979097921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1297909799 - 2⁴ = 1297909783 is a prime.

It is a Sophie Germain prime.

Together with 1297909801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297909793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648954899 + 648954900.

It is an arithmetic number, because the mean of its divisors is an integer number (648954900).

Almost surely, 2^1297909799 is an apocalyptic number.

1297909799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297909799 is an equidigital number, since it uses as much as digits as its factorization.

1297909799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5786802, while the sum is 62.

The square root of 1297909799 is about 36026.5152214310. The cubic root of 1297909799 is about 1090.8076383914.

The spelling of 1297909799 in words is "one billion, two hundred ninety-seven million, nine hundred nine thousand, seven hundred ninety-nine".