1198355597 has 2 divisors, whose sum is σ = 1198355598. Its totient is φ = 1198355596.

The previous prime is 1198355579. The next prime is 1198355611. The reversal of 1198355597 is 7955538911.

Together with previous prime (1198355579) 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., 989668681 + 208686916 = 31459^2 + 14446^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198355597 - 2⁶ = 1198355533 is a prime.

It is a super-2 number, since 2×1198355597² = 2872112273722452818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198355507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599177798 + 599177799.

It is an arithmetic number, because the mean of its divisors is an integer number (599177799).

Almost surely, 2^1198355597 is an apocalyptic number.

It is an amenable number.

1198355597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198355597 is an equidigital number, since it uses as much as digits as its factorization.

1198355597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701000, while the sum is 53.

The square root of 1198355597 is about 34617.2731017335. The cubic root of 1198355597 is about 1062.1729475881.

The spelling of 1198355597 in words is "one billion, one hundred ninety-eight million, three hundred fifty-five thousand, five hundred ninety-seven".