202321997 has 2 divisors, whose sum is σ = 202321998. Its totient is φ = 202321996.

The previous prime is 202321993. The next prime is 202322047. The reversal of 202321997 is 799123202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193237801 + 9084196 = 13901^2 + 3014^2 .

It is a cyclic number.

It is not a de Polignac number, because 202321997 - 2² = 202321993 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202321993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101160998 + 101160999.

It is an arithmetic number, because the mean of its divisors is an integer number (101160999).

Almost surely, 2^202321997 is an apocalyptic number.

It is an amenable number.

202321997 is a deficient number, since it is larger than the sum of its proper divisors (1).

202321997 is an equidigital number, since it uses as much as digits as its factorization.

202321997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 202321997 is about 14223.9937078164. The cubic root of 202321997 is about 587.0580319851.

The spelling of 202321997 in words is "two hundred two million, three hundred twenty-one thousand, nine hundred ninety-seven".