1297797808 has 10 divisors (see below), whose sum is σ = 2514483284. Its totient is φ = 648898896.

The previous prime is 1297797779. The next prime is 1297797889. The reversal of 1297797808 is 8087977921.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40556166 + ... + 40556197.

Almost surely, 2^1297797808 is an apocalyptic number.

It is an amenable number.

1297797808 is a deficient number, since it is larger than the sum of its proper divisors (1216685476).

1297797808 is an equidigital number, since it uses as much as digits as its factorization.

1297797808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81112371 (or 81112365 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 58.

The square root of 1297797808 is about 36024.9609021301. The cubic root of 1297797808 is about 1090.7762638043.

The spelling of 1297797808 in words is "one billion, two hundred ninety-seven million, seven hundred ninety-seven thousand, eight hundred eight".