1312809049 has 8 divisors (see below), whose sum is σ = 1386674432. Its totient is φ = 1240913520.

The previous prime is 1312809031. The next prime is 1312809073. The reversal of 1312809049 is 9409082131.

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 1312809049 - 2¹⁵ = 1312776281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312808999 and 1312809017.

It is not an unprimeable number, because it can be changed into a prime (1312809079) 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 7 ways as a sum of consecutive naturals, for example, 491094 + ... + 493759.

It is an arithmetic number, because the mean of its divisors is an integer number (173334304).

Almost surely, 2^1312809049 is an apocalyptic number.

It is an amenable number.

1312809049 is a deficient number, since it is larger than the sum of its proper divisors (73865383).

1312809049 is an equidigital number, since it uses as much as digits as its factorization.

1312809049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984927.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1312809049 is about 36232.7068958420. The cubic root of 1312809049 is about 1094.9657138476.

The spelling of 1312809049 in words is "one billion, three hundred twelve million, eight hundred nine thousand, forty-nine".