1198840417 has 2 divisors, whose sum is σ = 1198840418. Its totient is φ = 1198840416.

The previous prime is 1198840403. The next prime is 1198840429. The reversal of 1198840417 is 7140488911.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1196883216 + 1957201 = 34596^2 + 1399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1198840417 is a prime.

It is not a weakly prime, because it can be changed into another prime (1198840217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599420208 + 599420209.

It is an arithmetic number, because the mean of its divisors is an integer number (599420209).

Almost surely, 2^1198840417 is an apocalyptic number.

It is an amenable number.

1198840417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198840417 is an equidigital number, since it uses as much as digits as its factorization.

1198840417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 1198840417 is about 34624.2749671383. The cubic root of 1198840417 is about 1062.3161697555.

The spelling of 1198840417 in words is "one billion, one hundred ninety-eight million, eight hundred forty thousand, four hundred seventeen".