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997733221 is a prime number
BaseRepresentation
bin111011011110000…
…011001101100101
32120112102002200021
4323132003031211
54020404430341
6243000515141
733503410132
oct7336031545
92515362607
10997733221
11472215811
1223a17bab1
1312b9254b4
149671b589
155c8d49d1
hex3b783365

997733221 has 2 divisors, whose sum is σ = 997733222. Its totient is φ = 997733220.

The previous prime is 997733203. The next prime is 997733239. The reversal of 997733221 is 122337799.

It is a balanced prime because it is at equal distance from previous prime (997733203) and next prime (997733239).

It can be written as a sum of positive squares in only one way, i.e., 993132196 + 4601025 = 31514^2 + 2145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-997733221 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997733021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498866610 + 498866611.

It is an arithmetic number, because the mean of its divisors is an integer number (498866611).

Almost surely, 2997733221 is an apocalyptic number.

It is an amenable number.

997733221 is a deficient number, since it is larger than the sum of its proper divisors (1).

997733221 is an equidigital number, since it uses as much as digits as its factorization.

997733221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 43.

The square root of 997733221 is about 31586.9153448069. The cubic root of 997733221 is about 999.2438353592.

The spelling of 997733221 in words is "nine hundred ninety-seven million, seven hundred thirty-three thousand, two hundred twenty-one".