1331304413 has 4 divisors (see below), whose sum is σ = 1338659868. Its totient is φ = 1323948960.

The previous prime is 1331304397. The next prime is 1331304419. The reversal of 1331304413 is 3144031331.

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 56957209 + 1274347204 = 7547^2 + 35698^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331304413 - 2⁴ = 1331304397 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 (1331304419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3677456 + ... + 3677817.

It is an arithmetic number, because the mean of its divisors is an integer number (334664967).

Almost surely, 2^1331304413 is an apocalyptic number.

It is an amenable number.

1331304413 is a deficient number, since it is larger than the sum of its proper divisors (7355455).

1331304413 is an equidigital number, since it uses as much as digits as its factorization.

1331304413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7355454.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1331304413 is about 36487.0444541621. The cubic root of 1331304413 is about 1100.0838539382.

Adding to 1331304413 its reverse (3144031331), we get a palindrome (4475335744).

The spelling of 1331304413 in words is "one billion, three hundred thirty-one million, three hundred four thousand, four hundred thirteen".