1311020998 has 8 divisors (see below), whose sum is σ = 2247464592. Its totient is φ = 561866136.

The previous prime is 1311020987. The next prime is 1311021001. The reversal of 1311020998 is 8990201131.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46822165 + ... + 46822192.

It is an arithmetic number, because the mean of its divisors is an integer number (280933074).

Almost surely, 2^1311020998 is an apocalyptic number.

1311020998 is a deficient number, since it is larger than the sum of its proper divisors (936443594).

1311020998 is an equidigital number, since it uses as much as digits as its factorization.

1311020998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93644366.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1311020998 is about 36208.0239449766. The cubic root of 1311020998 is about 1094.4683721403.

The spelling of 1311020998 in words is "one billion, three hundred eleven million, twenty thousand, nine hundred ninety-eight".