1340313309 has 6 divisors (see below), whose sum is σ = 1936008126. Its totient is φ = 893542200.

The previous prime is 1340313301. The next prime is 1340313323. The reversal of 1340313309 is 9033130431.

1340313309 is a `hidden beast` number, since 1 + 3 + 40 + 313 + 309 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1328821209 + 11492100 = 36453^2 + 3390^2 .

It is not a de Polignac number, because 1340313309 - 2³ = 1340313301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340313301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74461842 + ... + 74461859.

It is an arithmetic number, because the mean of its divisors is an integer number (322668021).

Almost surely, 2^1340313309 is an apocalyptic number.

It is an amenable number.

1340313309 is a deficient number, since it is larger than the sum of its proper divisors (595694817).

1340313309 is a wasteful number, since it uses less digits than its factorization.

1340313309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148923707 (or 148923704 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 1340313309 is about 36610.2896601488. The cubic root of 1340313309 is about 1102.5596888720.

The spelling of 1340313309 in words is "one billion, three hundred forty million, three hundred thirteen thousand, three hundred nine".