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73028561 is a prime number
BaseRepresentation
bin1000101101001…
…01001111010001
312002102020100112
410112211033101
5122143403221
611125131105
71544506154
oct426451721
9162366315
1073028561
113824a491
1220559a95
131218c188
1499adc9b
15662815b
hex45a53d1

73028561 has 2 divisors, whose sum is σ = 73028562. Its totient is φ = 73028560.

The previous prime is 73028513. The next prime is 73028563. The reversal of 73028561 is 16582037.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46444225 + 26584336 = 6815^2 + 5156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-73028561 is a prime.

Together with 73028563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73028563) 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, 36514280 + 36514281.

It is an arithmetic number, because the mean of its divisors is an integer number (36514281).

Almost surely, 273028561 is an apocalyptic number.

It is an amenable number.

73028561 is a deficient number, since it is larger than the sum of its proper divisors (1).

73028561 is an equidigital number, since it uses as much as digits as its factorization.

73028561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 73028561 is about 8545.6749879691. The cubic root of 73028561 is about 417.9884176030.

The spelling of 73028561 in words is "seventy-three million, twenty-eight thousand, five hundred sixty-one".