1311906193 has 4 divisors (see below), whose sum is σ = 1412822068. Its totient is φ = 1210990320.

The previous prime is 1311906173. The next prime is 1311906209. The reversal of 1311906193 is 3916091131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 572501329 + 739404864 = 23927^2 + 27192^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311906193 - 2⁵ = 1311906161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311906103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50457918 + ... + 50457943.

It is an arithmetic number, because the mean of its divisors is an integer number (353205517).

Almost surely, 2^1311906193 is an apocalyptic number.

1311906193 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1311906193 is a deficient number, since it is larger than the sum of its proper divisors (100915875).

1311906193 is a wasteful number, since it uses less digits than its factorization.

1311906193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100915874.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 1311906193 is about 36220.2456231318. The cubic root of 1311906193 is about 1094.7146432951.

The spelling of 1311906193 in words is "one billion, three hundred eleven million, nine hundred six thousand, one hundred ninety-three".