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3721217 is a prime number
BaseRepresentation
bin1110001100100000000001
321000001112212
432030200001
51423034332
6211431505
743426013
oct16144001
97001485
103721217
112111895
1212b5595
13a03a06
146cc1b3
154d78b2
hex38c801

3721217 has 2 divisors, whose sum is σ = 3721218. Its totient is φ = 3721216.

The previous prime is 3721213. The next prime is 3721229. The reversal of 3721217 is 7121273.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3690241 + 30976 = 1921^2 + 176^2 .

It is a cyclic number.

It is not a de Polignac number, because 3721217 - 22 = 3721213 is a prime.

It is a super-2 number, since 2×37212172 = 27694911922178, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3721192 and 3721201.

It is not a weakly prime, because it can be changed into another prime (3721213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860608 + 1860609.

It is an arithmetic number, because the mean of its divisors is an integer number (1860609).

It is a Proth number, since it is equal to 1817 ⋅ 211 + 1 and 1817 < 211.

Almost surely, 23721217 is an apocalyptic number.

It is an amenable number.

3721217 is a deficient number, since it is larger than the sum of its proper divisors (1).

3721217 is an equidigital number, since it uses as much as digits as its factorization.

3721217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 588, while the sum is 23.

The square root of 3721217 is about 1929.0456189525. The cubic root of 3721217 is about 154.9631129705.

The spelling of 3721217 in words is "three million, seven hundred twenty-one thousand, two hundred seventeen".