1347086809 has 4 divisors (see below), whose sum is σ = 1349328820. Its totient is φ = 1344844800.

The previous prime is 1347086777. The next prime is 1347086813. The reversal of 1347086809 is 9086807431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9086807431 = 13 ⋅698985187.

It can be written as a sum of positive squares in 2 ways, for example, as 1283645584 + 63441225 = 35828^2 + 7965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1347086809 - 2⁵ = 1347086777 is a prime.

It is a super-3 number, since 3×1347086809³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1347086869) 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, 1120104 + ... + 1121305.

It is an arithmetic number, because the mean of its divisors is an integer number (337332205).

Almost surely, 2^1347086809 is an apocalyptic number.

It is an amenable number.

1347086809 is a deficient number, since it is larger than the sum of its proper divisors (2242011).

1347086809 is an equidigital number, since it uses as much as digits as its factorization.

1347086809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242010.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 1347086809 is about 36702.6812235837. The cubic root of 1347086809 is about 1104.4138928160.

The spelling of 1347086809 in words is "one billion, three hundred forty-seven million, eighty-six thousand, eight hundred nine".