1198129811 has 8 divisors (see below), whose sum is σ = 1208471040. Its totient is φ = 1187803008.

The previous prime is 1198129789. The next prime is 1198129843. The reversal of 1198129811 is 1189218911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1198129811 - 2¹⁰ = 1198128787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1198129861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223025 + ... + 228333.

It is an arithmetic number, because the mean of its divisors is an integer number (151058880).

Almost surely, 2^1198129811 is an apocalyptic number.

1198129811 is a deficient number, since it is larger than the sum of its proper divisors (10341229).

1198129811 is a wasteful number, since it uses less digits than its factorization.

1198129811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7213.

The product of its digits is 10368, while the sum is 41.

The square root of 1198129811 is about 34614.0117726911. The cubic root of 1198129811 is about 1062.1062342672.

The spelling of 1198129811 in words is "one billion, one hundred ninety-eight million, one hundred twenty-nine thousand, eight hundred eleven".