1311579745 has 8 divisors (see below), whose sum is σ = 1798737984. Its totient is φ = 899368944.

The previous prime is 1311579743. The next prime is 1311579769. The reversal of 1311579745 is 5479751131.

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 1311579745 - 2¹ = 1311579743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311579743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18736819 + ... + 18736888.

It is an arithmetic number, because the mean of its divisors is an integer number (224842248).

Almost surely, 2^1311579745 is an apocalyptic number.

It is an amenable number.

1311579745 is a deficient number, since it is larger than the sum of its proper divisors (487158239).

1311579745 is an equidigital number, since it uses as much as digits as its factorization.

1311579745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37473719.

The product of its digits is 132300, while the sum is 43.

The square root of 1311579745 is about 36215.7389127987. The cubic root of 1311579745 is about 1094.6238347059.

The spelling of 1311579745 in words is "one billion, three hundred eleven million, five hundred seventy-nine thousand, seven hundred forty-five".