1305382109 has 4 divisors (see below), whose sum is σ = 1305522204. Its totient is φ = 1305242016.

The previous prime is 1305382093. The next prime is 1305382157. The reversal of 1305382109 is 9012835031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 570158884 + 735223225 = 23878^2 + 27115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305382109 - 2⁴ = 1305382093 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 (1305382609) 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, 54992 + ... + 75065.

It is an arithmetic number, because the mean of its divisors is an integer number (326380551).

Almost surely, 2^1305382109 is an apocalyptic number.

It is an amenable number.

1305382109 is a deficient number, since it is larger than the sum of its proper divisors (140095).

1305382109 is a wasteful number, since it uses less digits than its factorization.

1305382109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140094.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1305382109 is about 36130.0720868365. The cubic root of 1305382109 is about 1092.8969619775.

The spelling of 1305382109 in words is "one billion, three hundred five million, three hundred eighty-two thousand, one hundred nine".