320289901 has 2 divisors, whose sum is σ = 320289902. Its totient is φ = 320289900.

The previous prime is 320289899. The next prime is 320289917. The reversal of 320289901 is 109982023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237006025 + 83283876 = 15395^2 + 9126^2 .

It is a cyclic number.

It is not a de Polignac number, because 320289901 - 2¹ = 320289899 is a prime.

Together with 320289899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320289941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160144950 + 160144951.

It is an arithmetic number, because the mean of its divisors is an integer number (160144951).

Almost surely, 2^320289901 is an apocalyptic number.

It is an amenable number.

320289901 is a deficient number, since it is larger than the sum of its proper divisors (1).

320289901 is an equidigital number, since it uses as much as digits as its factorization.

320289901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 320289901 is about 17896.6449649089. The cubic root of 320289901 is about 684.1968678846.

The spelling of 320289901 in words is "three hundred twenty million, two hundred eighty-nine thousand, nine hundred one".