1200109997 has 2 divisors, whose sum is σ = 1200109998. Its totient is φ = 1200109996.

The previous prime is 1200109991. The next prime is 1200110011. The reversal of 1200109997 is 7999010021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 865183396 + 334926601 = 29414^2 + 18301^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200109997 - 2²⁰ = 1199061421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200109997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200109991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600054998 + 600054999.

It is an arithmetic number, because the mean of its divisors is an integer number (600054999).

Almost surely, 2^1200109997 is an apocalyptic number.

It is an amenable number.

1200109997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200109997 is an equidigital number, since it uses as much as digits as its factorization.

1200109997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 1200109997 is about 34642.6037849351. The cubic root of 1200109997 is about 1062.6910374280.

The spelling of 1200109997 in words is "one billion, two hundred million, one hundred nine thousand, nine hundred ninety-seven".