1320000403 has 4 divisors (see below), whose sum is σ = 1322060328. Its totient is φ = 1317940480.

The previous prime is 1320000397. The next prime is 1320000413. The reversal of 1320000403 is 3040000231.

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-1320000403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320000413) 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, 1029001 + ... + 1030282.

It is an arithmetic number, because the mean of its divisors is an integer number (330515082).

Almost surely, 2^1320000403 is an apocalyptic number.

1320000403 is a deficient number, since it is larger than the sum of its proper divisors (2059925).

1320000403 is an equidigital number, since it uses as much as digits as its factorization.

1320000403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059924.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1320000403 is about 36331.8097952744. The cubic root of 1320000403 is about 1096.9614221217.

Adding to 1320000403 its reverse (3040000231), we get a palindrome (4360000634).

The spelling of 1320000403 in words is "one billion, three hundred twenty million, four hundred three", and thus it is an aban number.