1311838057 has 4 divisors (see below), whose sum is σ = 1311969280. Its totient is φ = 1311706836.

The previous prime is 1311838043. The next prime is 1311838079. The reversal of 1311838057 is 7508381131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7508381131 = 173 ⋅43401047.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311838057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311838007) 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, 49257 + ... + 71062.

It is an arithmetic number, because the mean of its divisors is an integer number (327992320).

Almost surely, 2^1311838057 is an apocalyptic number.

It is an amenable number.

1311838057 is a deficient number, since it is larger than the sum of its proper divisors (131223).

1311838057 is a wasteful number, since it uses less digits than its factorization.

1311838057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131222.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1311838057 is about 36219.3050319854. The cubic root of 1311838057 is about 1094.6956910335.

The spelling of 1311838057 in words is "one billion, three hundred eleven million, eight hundred thirty-eight thousand, fifty-seven".