1304403013 has 4 divisors (see below), whose sum is σ = 1381132620. Its totient is φ = 1227673408.

The previous prime is 1304402999. The next prime is 1304403019. The reversal of 1304403013 is 3103044031.

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 694955044 + 609447969 = 26362^2 + 24687^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304403013 - 2²¹ = 1302305861 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 (1304403019) 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, 38364778 + ... + 38364811.

It is an arithmetic number, because the mean of its divisors is an integer number (345283155).

Almost surely, 2^1304403013 is an apocalyptic number.

It is an amenable number.

1304403013 is a deficient number, since it is larger than the sum of its proper divisors (76729607).

1304403013 is an equidigital number, since it uses as much as digits as its factorization.

1304403013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76729606.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1304403013 is about 36116.5199458641. The cubic root of 1304403013 is about 1092.6236528121.

Adding to 1304403013 its reverse (3103044031), we get a palindrome (4407447044).

The spelling of 1304403013 in words is "one billion, three hundred four million, four hundred three thousand, thirteen".