320202397 has 2 divisors, whose sum is σ = 320202398. Its totient is φ = 320202396.

The previous prime is 320202371. The next prime is 320202437. The reversal of 320202397 is 793202023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295461721 + 24740676 = 17189^2 + 4974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320202397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320202697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160101198 + 160101199.

It is an arithmetic number, because the mean of its divisors is an integer number (160101199).

Almost surely, 2^320202397 is an apocalyptic number.

It is an amenable number.

320202397 is a deficient number, since it is larger than the sum of its proper divisors (1).

320202397 is an equidigital number, since it uses as much as digits as its factorization.

320202397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 320202397 is about 17894.2000938852. The cubic root of 320202397 is about 684.1345541124.

The spelling of 320202397 in words is "three hundred twenty million, two hundred two thousand, three hundred ninety-seven".