97021 has 2 divisors, whose sum is σ = 97022.
Its totient is φ = 97020.
The previous prime is 97007. The next prime is 97039. The reversal of 97021 is 12079.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 68121 + 28900 = 261^2 + 170^2
It is a cyclic number.
It is not a de Polignac number, because 97021 - 25 = 96989 is a prime.
It is a Chen prime.
It is a pancake number, because a pancake can be divided into 97021 parts by 440 straight cuts.
It is a self number, because there is not a number n which added to its sum of digits gives 97021.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (97001) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48510 + 48511.
It is an arithmetic number, because the mean of its divisors is an integer number (48511).
297021 is an apocalyptic number.
It is an amenable number.
97021 is a deficient number, since it is larger than the sum of its proper divisors (1).
97021 is an equidigital number, since it uses as much as digits as its factorization.
97021 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 126, while the sum is 19.
The square root of 97021 is about 311.4819416916.
The cubic root of 97021 is about 45.9503244463.
The spelling of 97021 in words is "ninety-seven thousand, twenty-one".