1313928849 has 4 divisors (see below), whose sum is σ = 1751905136. Its totient is φ = 875952564.

The previous prime is 1313928841. The next prime is 1313928887. The reversal of 1313928849 is 9488293131.

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.

It is not a de Polignac number, because 1313928849 - 2³ = 1313928841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313928798 and 1313928807.

It is not an unprimeable number, because it can be changed into a prime (1313928841) 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, 218988139 + ... + 218988144.

It is an arithmetic number, because the mean of its divisors is an integer number (437976284).

Almost surely, 2^1313928849 is an apocalyptic number.

It is an amenable number.

1313928849 is a deficient number, since it is larger than the sum of its proper divisors (437976287).

1313928849 is an equidigital number, since it uses as much as digits as its factorization.

1313928849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437976286.

The product of its digits is 373248, while the sum is 48.

The square root of 1313928849 is about 36248.1564910548. The cubic root of 1313928849 is about 1095.2769533604.

The spelling of 1313928849 in words is "one billion, three hundred thirteen million, nine hundred twenty-eight thousand, eight hundred forty-nine".