1199997927697 has 2 divisors, whose sum is σ = 1199997927698. Its totient is φ = 1199997927696.

The previous prime is 1199997927679. The next prime is 1199997927703. The reversal of 1199997927697 is 7967297999911.

Together with previous prime (1199997927679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 914746867776 + 285251059921 = 956424^2 + 534089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1199997927697 - 2³⁹ = 650242113809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1199997927197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599998963848 + 599998963849.

It is an arithmetic number, because the mean of its divisors is an integer number (599998963849).

Almost surely, 2^{1199997927697} is an apocalyptic number.

It is an amenable number.

1199997927697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199997927697 is an equidigital number, since it uses as much as digits as its factorization.

1199997927697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187411156, while the sum is 85.

The spelling of 1199997927697 in words is "one trillion, one hundred ninety-nine billion, nine hundred ninety-seven million, nine hundred twenty-seven thousand, six hundred ninety-seven".