75520789 has 2 divisors, whose sum is σ = 75520790. Its totient is φ = 75520788.

The previous prime is 75520751. The next prime is 75520793. The reversal of 75520789 is 98702557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66699889 + 8820900 = 8167^2 + 2970^2 .

It is an emirp because it is prime and its reverse (98702557) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75520789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75550789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37760394 + 37760395.

It is an arithmetic number, because the mean of its divisors is an integer number (37760395).

Almost surely, 2^75520789 is an apocalyptic number.

It is an amenable number.

75520789 is a deficient number, since it is larger than the sum of its proper divisors (1).

75520789 is an equidigital number, since it uses as much as digits as its factorization.

75520789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 75520789 is about 8690.2697886774. The cubic root of 75520789 is about 422.6901941208.

The spelling of 75520789 in words is "seventy-five million, five hundred twenty thousand, seven hundred eighty-nine".