1200343399 has 4 divisors (see below), whose sum is σ = 1201202800. Its totient is φ = 1199484000.

The previous prime is 1200343393. The next prime is 1200343423. The reversal of 1200343399 is 9933430021.

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

It is a cyclic number.

It is not a de Polignac number, because 1200343399 - 2¹⁹ = 1199819111 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 (1200343393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427602 + ... + 430399.

It is an arithmetic number, because the mean of its divisors is an integer number (300300700).

Almost surely, 2^1200343399 is an apocalyptic number.

1200343399 is a deficient number, since it is larger than the sum of its proper divisors (859401).

1200343399 is an equidigital number, since it uses as much as digits as its factorization.

1200343399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859400.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 1200343399 is about 34645.9723344576. The cubic root of 1200343399 is about 1062.7599250400.

The spelling of 1200343399 in words is "one billion, two hundred million, three hundred forty-three thousand, three hundred ninety-nine".