1197320849 has 2 divisors, whose sum is σ = 1197320850. Its totient is φ = 1197320848.

The previous prime is 1197320833. The next prime is 1197320857. The reversal of 1197320849 is 9480237911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 997296400 + 200024449 = 31580^2 + 14143^2 .

It is a cyclic number.

It is not a de Polignac number, because 1197320849 - 2⁴ = 1197320833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1197320819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598660424 + 598660425.

It is an arithmetic number, because the mean of its divisors is an integer number (598660425).

Almost surely, 2^1197320849 is an apocalyptic number.

It is an amenable number.

1197320849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1197320849 is an equidigital number, since it uses as much as digits as its factorization.

1197320849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 1197320849 is about 34602.3243294435. The cubic root of 1197320849 is about 1061.8671402440.

The spelling of 1197320849 in words is "one billion, one hundred ninety-seven million, three hundred twenty thousand, eight hundred forty-nine".