1311683405 has 8 divisors (see below), whose sum is σ = 1583119512. Its totient is φ = 1043280448.

The previous prime is 1311683393. The next prime is 1311683413. The reversal of 1311683405 is 5043861131.

It can be written as a sum of positive squares in 4 ways, for example, as 74684164 + 1236999241 = 8642^2 + 35171^2 .

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 1311683405 - 2⁴ = 1311683389 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 757334 + ... + 759063.

It is an arithmetic number, because the mean of its divisors is an integer number (197889939).

Almost surely, 2^1311683405 is an apocalyptic number.

It is an amenable number.

1311683405 is a deficient number, since it is larger than the sum of its proper divisors (271436107).

1311683405 is a wasteful number, since it uses less digits than its factorization.

1311683405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516575.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1311683405 is about 36217.1700302495. The cubic root of 1311683405 is about 1094.6526716149.

The spelling of 1311683405 in words is "one billion, three hundred eleven million, six hundred eighty-three thousand, four hundred five".