1198378579 has 2 divisors, whose sum is σ = 1198378580. Its totient is φ = 1198378578.

The previous prime is 1198378553. The next prime is 1198378619. The reversal of 1198378579 is 9758738911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1198378579 - 2¹³ = 1198370387 is a prime.

It is a super-2 number, since 2×1198378579² = 2872222437212118482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1198378079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599189289 + 599189290.

It is an arithmetic number, because the mean of its divisors is an integer number (599189290).

Almost surely, 2^1198378579 is an apocalyptic number.

1198378579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198378579 is an equidigital number, since it uses as much as digits as its factorization.

1198378579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 58.

The square root of 1198378579 is about 34617.6050442546. The cubic root of 1198378579 is about 1062.1797376435.

The spelling of 1198378579 in words is "one billion, one hundred ninety-eight million, three hundred seventy-eight thousand, five hundred seventy-nine".