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30123517 is a prime number
BaseRepresentation
bin111001011101…
…0010111111101
32002200102200211
41302322113331
530202423032
62553352421
7514021444
oct162722775
962612624
1030123517
1116005276
12a108711
136319288
144001d5b
1529a0747
hex1cba5fd

30123517 has 2 divisors, whose sum is σ = 30123518. Its totient is φ = 30123516.

The previous prime is 30123497. The next prime is 30123593. The reversal of 30123517 is 71532103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22221796 + 7901721 = 4714^2 + 2811^2 .

It is an emirp because it is prime and its reverse (71532103) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-30123517 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 (30123917) 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, 15061758 + 15061759.

It is an arithmetic number, because the mean of its divisors is an integer number (15061759).

Almost surely, 230123517 is an apocalyptic number.

It is an amenable number.

30123517 is a deficient number, since it is larger than the sum of its proper divisors (1).

30123517 is an equidigital number, since it uses as much as digits as its factorization.

30123517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 30123517 is about 5488.4895007643. The cubic root of 30123517 is about 311.1491067209.

The spelling of 30123517 in words is "thirty million, one hundred twenty-three thousand, five hundred seventeen".