320229997 has 2 divisors, whose sum is σ = 320229998. Its totient is φ = 320229996.

The previous prime is 320229961. The next prime is 320230021. The reversal of 320229997 is 799922023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316092841 + 4137156 = 17779^2 + 2034^2 .

It is a cyclic number.

It is not a de Polignac number, because 320229997 - 2¹¹ = 320227949 is a prime.

It is equal to p_17286946 and since 320229997 and 17286946 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320229947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160114998 + 160114999.

It is an arithmetic number, because the mean of its divisors is an integer number (160114999).

Almost surely, 2^320229997 is an apocalyptic number.

It is an amenable number.

320229997 is a deficient number, since it is larger than the sum of its proper divisors (1).

320229997 is an equidigital number, since it uses as much as digits as its factorization.

320229997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 320229997 is about 17894.9712768699. The cubic root of 320229997 is about 684.1542099836.

The spelling of 320229997 in words is "three hundred twenty million, two hundred twenty-nine thousand, nine hundred ninety-seven".