75564917 has 2 divisors, whose sum is σ = 75564918. Its totient is φ = 75564916.

The previous prime is 75564883. The next prime is 75564941. The reversal of 75564917 is 71946557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47251876 + 28313041 = 6874^2 + 5321^2 .

It is an emirp because it is prime and its reverse (71946557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75564917 - 2¹⁴ = 75548533 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 (75564977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37782458 + 37782459.

It is an arithmetic number, because the mean of its divisors is an integer number (37782459).

Almost surely, 2^75564917 is an apocalyptic number.

It is an amenable number.

75564917 is a deficient number, since it is larger than the sum of its proper divisors (1).

75564917 is an equidigital number, since it uses as much as digits as its factorization.

75564917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 44.

The square root of 75564917 is about 8692.8083494346. The cubic root of 75564917 is about 422.7725062953.

The spelling of 75564917 in words is "seventy-five million, five hundred sixty-four thousand, nine hundred seventeen".