1311498709 has 4 divisors (see below), whose sum is σ = 1368520416. Its totient is φ = 1254477004.

The previous prime is 1311498703. The next prime is 1311498733. The reversal of 1311498709 is 9078941131.

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 a cyclic number.

It is not a de Polignac number, because 1311498709 - 2³ = 1311498701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311498701) 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 3 ways as a sum of consecutive naturals, for example, 28510819 + ... + 28510864.

It is an arithmetic number, because the mean of its divisors is an integer number (342130104).

Almost surely, 2^1311498709 is an apocalyptic number.

It is an amenable number.

1311498709 is a deficient number, since it is larger than the sum of its proper divisors (57021707).

1311498709 is an equidigital number, since it uses as much as digits as its factorization.

1311498709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57021706.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 1311498709 is about 36214.6201001750. The cubic root of 1311498709 is about 1094.6012904511.

The spelling of 1311498709 in words is "one billion, three hundred eleven million, four hundred ninety-eight thousand, seven hundred nine".