1391133398 has 8 divisors (see below), whose sum is σ = 2107360800. Its totient is φ = 688679800.

The previous prime is 1391133397. The next prime is 1391133413. The reversal of 1391133398 is 8933311931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391133391) 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, 3443198 + ... + 3443601.

It is an arithmetic number, because the mean of its divisors is an integer number (263420100).

Almost surely, 2^1391133398 is an apocalyptic number.

1391133398 is a deficient number, since it is larger than the sum of its proper divisors (716227402).

1391133398 is a wasteful number, since it uses less digits than its factorization.

1391133398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6886902.

The product of its digits is 52488, while the sum is 41.

The square root of 1391133398 is about 37297.9007184051. The cubic root of 1391133398 is about 1116.3222793445.

The spelling of 1391133398 in words is "one billion, three hundred ninety-one million, one hundred thirty-three thousand, three hundred ninety-eight".