1311840493 has 8 divisors (see below), whose sum is σ = 1322155008. Its totient is φ = 1301562624.

The previous prime is 1311840487. The next prime is 1311840511. The reversal of 1311840493 is 3940481131.

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 1311840493 - 2⁵ = 1311840461 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 (1311840293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65046 + ... + 82792.

It is an arithmetic number, because the mean of its divisors is an integer number (165269376).

Almost surely, 2^1311840493 is an apocalyptic number.

It is an amenable number.

1311840493 is a deficient number, since it is larger than the sum of its proper divisors (10314515).

1311840493 is a wasteful number, since it uses less digits than its factorization.

1311840493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18323.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1311840493 is about 36219.3386604449. The cubic root of 1311840493 is about 1094.6963686265.

The spelling of 1311840493 in words is "one billion, three hundred eleven million, eight hundred forty thousand, four hundred ninety-three".