1198218913 has 16 divisors (see below), whose sum is σ = 1263093760. Its totient is φ = 1135166400.

The previous prime is 1198218899. The next prime is 1198218929. The reversal of 1198218913 is 3198128911.

It is a cyclic number.

It is not a de Polignac number, because 1198218913 - 2⁵ = 1198218881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1198218913.

It is not an unprimeable number, because it can be changed into a prime (1198218943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431656 + ... + 434422.

It is an arithmetic number, because the mean of its divisors is an integer number (78943360).

Almost surely, 2^1198218913 is an apocalyptic number.

It is an amenable number.

1198218913 is a deficient number, since it is larger than the sum of its proper divisors (64874847).

1198218913 is a wasteful number, since it uses less digits than its factorization.

1198218913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088.

The product of its digits is 31104, while the sum is 43.

The square root of 1198218913 is about 34615.2988286971. The cubic root of 1198218913 is about 1062.1325623670.

The spelling of 1198218913 in words is "one billion, one hundred ninety-eight million, two hundred eighteen thousand, nine hundred thirteen".