1304004623 has 4 divisors (see below), whose sum is σ = 1304322768. Its totient is φ = 1303686480.

The previous prime is 1304004577. The next prime is 1304004629. The reversal of 1304004623 is 3264004031.

It is a happy number.

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-1304004623 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 (1304004629) 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, 152843 + ... + 161148.

It is an arithmetic number, because the mean of its divisors is an integer number (326080692).

Almost surely, 2^1304004623 is an apocalyptic number.

1304004623 is a deficient number, since it is larger than the sum of its proper divisors (318145).

1304004623 is an equidigital number, since it uses as much as digits as its factorization.

1304004623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318144.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1304004623 is about 36111.0041815511. The cubic root of 1304004623 is about 1092.5124053281.

Adding to 1304004623 its reverse (3264004031), we get a palindrome (4568008654).

The spelling of 1304004623 in words is "one billion, three hundred four million, four thousand, six hundred twenty-three".