1345343999 has 4 divisors (see below), whose sum is σ = 1350308640. Its totient is φ = 1340379360.

The previous prime is 1345343969. The next prime is 1345344023. The reversal of 1345343999 is 9993435431.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345343999 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 (1345343969) 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, 2481914 + ... + 2482455.

It is an arithmetic number, because the mean of its divisors is an integer number (337577160).

Almost surely, 2^1345343999 is an apocalyptic number.

1345343999 is a deficient number, since it is larger than the sum of its proper divisors (4964641).

1345343999 is an equidigital number, since it uses as much as digits as its factorization.

1345343999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4964640.

The product of its digits is 1574640, while the sum is 50.

The square root of 1345343999 is about 36678.9312685089. The cubic root of 1345343999 is about 1103.9374042850.

The spelling of 1345343999 in words is "one billion, three hundred forty-five million, three hundred forty-three thousand, nine hundred ninety-nine".