1198239481 has 2 divisors, whose sum is σ = 1198239482. Its totient is φ = 1198239480.

The previous prime is 1198239467. The next prime is 1198239517. The reversal of 1198239481 is 1849328911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 980942400 + 217297081 = 31320^2 + 14741^2 .

It is an emirp because it is prime and its reverse (1849328911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1198239481 - 2¹⁷ = 1198108409 is a prime.

It is a super-2 number, since 2×1198239481² = 2871555707654298722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1198239421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599119740 + 599119741.

It is an arithmetic number, because the mean of its divisors is an integer number (599119741).

Almost surely, 2^1198239481 is an apocalyptic number.

It is an amenable number.

1198239481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198239481 is an equidigital number, since it uses as much as digits as its factorization.

1198239481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The square root of 1198239481 is about 34615.5959214918. The cubic root of 1198239481 is about 1062.1386396698.

The spelling of 1198239481 in words is "one billion, one hundred ninety-eight million, two hundred thirty-nine thousand, four hundred eighty-one".