1331913 has 8 divisors (see below), whose sum is σ = 1937376. Its totient is φ = 807200.

The previous prime is 1331857. The next prime is 1331921. The reversal of 1331913 is 3191331.

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 1331913 - 2⁸ = 1331657 is a prime.

It is a Curzon number.

1331913 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331913.

It is not an unprimeable number, because it can be changed into a prime (1331923) 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, 20148 + ... + 20213.

It is an arithmetic number, because the mean of its divisors is an integer number (242172).

2^1331913 is an apocalyptic number.

It is an amenable number.

1331913 is a deficient number, since it is larger than the sum of its proper divisors (605463).

1331913 is a wasteful number, since it uses less digits than its factorization.

1331913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40375.

The product of its digits is 243, while the sum is 21.

The square root of 1331913 is about 1154.0853521296. The cubic root of 1331913 is about 110.0251457664.

The spelling of 1331913 in words is "one million, three hundred thirty-one thousand, nine hundred thirteen".