1198001311 has 4 divisors (see below), whose sum is σ = 1290155272. Its totient is φ = 1105847352.

The previous prime is 1198001291. The next prime is 1198001317. The reversal of 1198001311 is 1131008911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1131008911 = 313 ⋅3613447.

It is a cyclic number.

It is not a de Polignac number, because 1198001311 - 2⁷ = 1198001183 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 (1198001317) 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, 46076961 + ... + 46076986.

It is an arithmetic number, because the mean of its divisors is an integer number (322538818).

Almost surely, 2^1198001311 is an apocalyptic number.

1198001311 is a deficient number, since it is larger than the sum of its proper divisors (92153961).

1198001311 is an equidigital number, since it uses as much as digits as its factorization.

1198001311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92153960.

The product of its (nonzero) digits is 216, while the sum is 25.

The square root of 1198001311 is about 34612.1555381921. The cubic root of 1198001311 is about 1062.0682624410.

The spelling of 1198001311 in words is "one billion, one hundred ninety-eight million, one thousand, three hundred eleven".