1198706879 has 4 divisors (see below), whose sum is σ = 1200059184. Its totient is φ = 1197354576.

The previous prime is 1198706837. The next prime is 1198706917. The reversal of 1198706879 is 9786078911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9786078911 = 7 ⋅1398011273.

It is a cyclic number.

It is not a de Polignac number, because 1198706879 - 2⁸ = 1198706623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198706809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674822 + ... + 676595.

It is an arithmetic number, because the mean of its divisors is an integer number (300014796).

Almost surely, 2^1198706879 is an apocalyptic number.

1198706879 is a deficient number, since it is larger than the sum of its proper divisors (1352305).

1198706879 is an equidigital number, since it uses as much as digits as its factorization.

1198706879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352304.

The product of its (nonzero) digits is 1524096, while the sum is 56.

The square root of 1198706879 is about 34622.3465264849. The cubic root of 1198706879 is about 1062.2767247379.

The spelling of 1198706879 in words is "one billion, one hundred ninety-eight million, seven hundred six thousand, eight hundred seventy-nine".