1304402313 has 4 divisors (see below), whose sum is σ = 1739203088. Its totient is φ = 869601540.

The previous prime is 1304402311. The next prime is 1304402317. The reversal of 1304402313 is 3132044031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3132044031 = 3 ⋅1044014677.

It is not a de Polignac number, because 1304402313 - 2¹ = 1304402311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1304402313.

It is not an unprimeable number, because it can be changed into a prime (1304402311) 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, 217400383 + ... + 217400388.

It is an arithmetic number, because the mean of its divisors is an integer number (434800772).

Almost surely, 2^1304402313 is an apocalyptic number.

It is an amenable number.

1304402313 is a deficient number, since it is larger than the sum of its proper divisors (434800775).

1304402313 is an equidigital number, since it uses as much as digits as its factorization.

1304402313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434800774.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1304402313 is about 36116.5102550066. The cubic root of 1304402313 is about 1092.6234573621.

Adding to 1304402313 its reverse (3132044031), we get a palindrome (4436446344).

The spelling of 1304402313 in words is "one billion, three hundred four million, four hundred two thousand, three hundred thirteen".