1198728679 has 2 divisors, whose sum is σ = 1198728680. Its totient is φ = 1198728678.

The previous prime is 1198728653. The next prime is 1198728683. The reversal of 1198728679 is 9768278911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1198728679 - 2⁷ = 1198728551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198728379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599364339 + 599364340.

It is an arithmetic number, because the mean of its divisors is an integer number (599364340).

Almost surely, 2^1198728679 is an apocalyptic number.

1198728679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198728679 is an equidigital number, since it uses as much as digits as its factorization.

1198728679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 58.

The square root of 1198728679 is about 34622.6613506241. The cubic root of 1198728679 is about 1062.2831643139.

The spelling of 1198728679 in words is "one billion, one hundred ninety-eight million, seven hundred twenty-eight thousand, six hundred seventy-nine".