1311690844 has 12 divisors (see below), whose sum is σ = 2308728744. Its totient is φ = 652054064.

The previous prime is 1311690841. The next prime is 1311690847. The reversal of 1311690844 is 4480961131.

It is an interprime number because it is at equal distance from previous prime (1311690841) and next prime (1311690847).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311690841) 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, 947062 + ... + 948445.

It is an arithmetic number, because the mean of its divisors is an integer number (192394062).

Almost surely, 2^1311690844 is an apocalyptic number.

It is an amenable number.

1311690844 is a deficient number, since it is larger than the sum of its proper divisors (997037900).

1311690844 is a wasteful number, since it uses less digits than its factorization.

1311690844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895684 (or 1895682 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1311690844 is about 36217.2727300110. The cubic root of 1311690844 is about 1094.6547409928.

The spelling of 1311690844 in words is "one billion, three hundred eleven million, six hundred ninety thousand, eight hundred forty-four".