1298117693 has 2 divisors, whose sum is σ = 1298117694. Its totient is φ = 1298117692.

The previous prime is 1298117663. The next prime is 1298117699. The reversal of 1298117693 is 3967118921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1229343844 + 68773849 = 35062^2 + 8293^2 .

It is an emirp because it is prime and its reverse (3967118921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1298117693 - 2⁶ = 1298117629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298117699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649058846 + 649058847.

It is an arithmetic number, because the mean of its divisors is an integer number (649058847).

Almost surely, 2^1298117693 is an apocalyptic number.

It is an amenable number.

1298117693 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298117693 is an equidigital number, since it uses as much as digits as its factorization.

1298117693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 47.

The square root of 1298117693 is about 36029.4003974532. The cubic root of 1298117693 is about 1090.8658756835.

The spelling of 1298117693 in words is "one billion, two hundred ninety-eight million, one hundred seventeen thousand, six hundred ninety-three".