1198840913 has 2 divisors, whose sum is σ = 1198840914. Its totient is φ = 1198840912.

The previous prime is 1198840871. The next prime is 1198840957. The reversal of 1198840913 is 3190488911.

It is an a-pointer prime, because the next prime (1198840957) can be obtained adding 1198840913 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1184942929 + 13897984 = 34423^2 + 3728^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198840913 - 2¹⁶ = 1198775377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1198840963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599420456 + 599420457.

It is an arithmetic number, because the mean of its divisors is an integer number (599420457).

Almost surely, 2^1198840913 is an apocalyptic number.

It is an amenable number.

1198840913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198840913 is an equidigital number, since it uses as much as digits as its factorization.

1198840913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 1198840913 is about 34624.2821297424. The cubic root of 1198840913 is about 1062.3163162606.

The spelling of 1198840913 in words is "one billion, one hundred ninety-eight million, eight hundred forty thousand, nine hundred thirteen".