320609143 has 2 divisors, whose sum is σ = 320609144. Its totient is φ = 320609142.

The previous prime is 320609131. The next prime is 320609189. The reversal of 320609143 is 341906023.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320609143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320604143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160304571 + 160304572.

It is an arithmetic number, because the mean of its divisors is an integer number (160304572).

Almost surely, 2^320609143 is an apocalyptic number.

320609143 is a deficient number, since it is larger than the sum of its proper divisors (1).

320609143 is an equidigital number, since it uses as much as digits as its factorization.

320609143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 320609143 is about 17905.5617895670. The cubic root of 320609143 is about 684.4241118554.

The spelling of 320609143 in words is "three hundred twenty million, six hundred nine thousand, one hundred forty-three".