1331135398 has 8 divisors (see below), whose sum is σ = 1998814392. Its totient is φ = 664863936.

The previous prime is 1331135371. The next prime is 1331135401. The reversal of 1331135398 is 8935311331.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349515 + ... + 353302.

It is an arithmetic number, because the mean of its divisors is an integer number (249851799).

Almost surely, 2^1331135398 is an apocalyptic number.

1331135398 is a deficient number, since it is larger than the sum of its proper divisors (667678994).

1331135398 is an equidigital number, since it uses as much as digits as its factorization.

1331135398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703766.

The product of its digits is 29160, while the sum is 37.

The square root of 1331135398 is about 36484.7282845850. The cubic root of 1331135398 is about 1100.0372984598.

The spelling of 1331135398 in words is "one billion, three hundred thirty-one million, one hundred thirty-five thousand, three hundred ninety-eight".