1198135717 has 2 divisors, whose sum is σ = 1198135718. Its totient is φ = 1198135716.

The previous prime is 1198135663. The next prime is 1198135733. The reversal of 1198135717 is 7175318911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1197782881 + 352836 = 34609^2 + 594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1198135717 is a prime.

It is a super-2 number, since 2×1198135717² = 2871058392702208178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198135747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599067858 + 599067859.

It is an arithmetic number, because the mean of its divisors is an integer number (599067859).

Almost surely, 2^1198135717 is an apocalyptic number.

It is an amenable number.

1198135717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198135717 is an equidigital number, since it uses as much as digits as its factorization.

1198135717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 43.

The square root of 1198135717 is about 34614.0970848584. The cubic root of 1198135717 is about 1062.1079794284.

The spelling of 1198135717 in words is "one billion, one hundred ninety-eight million, one hundred thirty-five thousand, seven hundred seventeen".