1340684965 has 4 divisors (see below), whose sum is σ = 1608821964. Its totient is φ = 1072547968.

The previous prime is 1340684951. The next prime is 1340684981. The reversal of 1340684965 is 5694860431.

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 662238756 + 678446209 = 25734^2 + 26047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340684965 - 2⁹ = 1340684453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134068492 + ... + 134068501.

It is an arithmetic number, because the mean of its divisors is an integer number (402205491).

Almost surely, 2^1340684965 is an apocalyptic number.

It is an amenable number.

1340684965 is a deficient number, since it is larger than the sum of its proper divisors (268136999).

1340684965 is an equidigital number, since it uses as much as digits as its factorization.

1340684965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268136998.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 1340684965 is about 36615.3651490737. The cubic root of 1340684965 is about 1102.6615891893.

The spelling of 1340684965 in words is "one billion, three hundred forty million, six hundred eighty-four thousand, nine hundred sixty-five".