1304421653 has 4 divisors (see below), whose sum is σ = 1349401740. Its totient is φ = 1259441568.

The previous prime is 1304421607. The next prime is 1304421659. The reversal of 1304421653 is 3561244031.

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 1070729284 + 233692369 = 32722^2 + 15287^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304421653 - 2⁸ = 1304421397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 44980057 = 1304421653 / (1 + 3 + 0 + 4 + 4 + 2 + 1 + 6 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304421659) 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, 22490000 + ... + 22490057.

It is an arithmetic number, because the mean of its divisors is an integer number (337350435).

Almost surely, 2^1304421653 is an apocalyptic number.

It is an amenable number.

1304421653 is a deficient number, since it is larger than the sum of its proper divisors (44980087).

1304421653 is an equidigital number, since it uses as much as digits as its factorization.

1304421653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44980086.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1304421653 is about 36116.7779985978. Note that the first 3 decimals coincide. The cubic root of 1304421653 is about 1092.6288573406.

Adding to 1304421653 its reverse (3561244031), we get a palindrome (4865665684).

The spelling of 1304421653 in words is "one billion, three hundred four million, four hundred twenty-one thousand, six hundred fifty-three".