1311678951 has 32 divisors (see below), whose sum is σ = 1927852800. Its totient is φ = 786689280.

The previous prime is 1311678947. The next prime is 1311678959. The reversal of 1311678951 is 1598761131.

It is not a de Polignac number, because 1311678951 - 2² = 1311678947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311678959) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2118720 + ... + 2119338.

It is an arithmetic number, because the mean of its divisors is an integer number (60245400).

Almost surely, 2^1311678951 is an apocalyptic number.

1311678951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1311678951 is a deficient number, since it is larger than the sum of its proper divisors (616173849).

1311678951 is a wasteful number, since it uses less digits than its factorization.

1311678951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199.

The product of its digits is 45360, while the sum is 42.

The square root of 1311678951 is about 36217.1085400257. The cubic root of 1311678951 is about 1094.6514325994.

The spelling of 1311678951 in words is "one billion, three hundred eleven million, six hundred seventy-eight thousand, nine hundred fifty-one".