323430553 has 2 divisors, whose sum is σ = 323430554. Its totient is φ = 323430552.

The previous prime is 323430517. The next prime is 323430557. The reversal of 323430553 is 355034323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222367744 + 101062809 = 14912^2 + 10053^2 .

It is a cyclic number.

It is not a de Polignac number, because 323430553 - 2¹⁷ = 323299481 is a prime.

It is a super-2 number, since 2×323430553² = 209214645227771618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (323430557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161715276 + 161715277.

It is an arithmetic number, because the mean of its divisors is an integer number (161715277).

Almost surely, 2^323430553 is an apocalyptic number.

It is an amenable number.

323430553 is a deficient number, since it is larger than the sum of its proper divisors (1).

323430553 is an equidigital number, since it uses as much as digits as its factorization.

323430553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 28.

The square root of 323430553 is about 17984.1750714343. The cubic root of 323430553 is about 686.4259304988.

Adding to 323430553 its reverse (355034323), we get a palindrome (678464876).

The spelling of 323430553 in words is "three hundred twenty-three million, four hundred thirty thousand, five hundred fifty-three".