1200320313 has 4 divisors (see below), whose sum is σ = 1600427088. Its totient is φ = 800213540.

The previous prime is 1200320311. The next prime is 1200320333. The reversal of 1200320313 is 3130230021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200320313 - 2¹ = 1200320311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200320292 and 1200320301.

It is not an unprimeable number, because it can be changed into a prime (1200320311) 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, 200053383 + ... + 200053388.

It is an arithmetic number, because the mean of its divisors is an integer number (400106772).

Almost surely, 2^1200320313 is an apocalyptic number.

It is an amenable number.

1200320313 is a deficient number, since it is larger than the sum of its proper divisors (400106775).

1200320313 is an equidigital number, since it uses as much as digits as its factorization.

1200320313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400106774.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1200320313 is about 34645.6391628153. The cubic root of 1200320313 is about 1062.7531117029.

Adding to 1200320313 its reverse (3130230021), we get a palindrome (4330550334).

The spelling of 1200320313 in words is "one billion, two hundred million, three hundred twenty thousand, three hundred thirteen".