513404323 has 2 divisors, whose sum is σ = 513404324. Its totient is φ = 513404322.

The previous prime is 513404303. The next prime is 513404329. The reversal of 513404323 is 323404315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513404323 - 2⁵ = 513404291 is a prime.

It is not a weakly prime, because it can be changed into another prime (513404329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256702161 + 256702162.

It is an arithmetic number, because the mean of its divisors is an integer number (256702162).

Almost surely, 2^513404323 is an apocalyptic number.

513404323 is a deficient number, since it is larger than the sum of its proper divisors (1).

513404323 is an equidigital number, since it uses as much as digits as its factorization.

513404323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 513404323 is about 22658.4271960787. The cubic root of 513404323 is about 800.7307505305.

Adding to 513404323 its reverse (323404315), we get a palindrome (836808638).

The spelling of 513404323 in words is "five hundred thirteen million, four hundred four thousand, three hundred twenty-three".