75285757 has 2 divisors, whose sum is σ = 75285758. Its totient is φ = 75285756.

The previous prime is 75285719. The next prime is 75285761. The reversal of 75285757 is 75758257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59197636 + 16088121 = 7694^2 + 4011^2 .

It is a cyclic number.

It is not a de Polignac number, because 75285757 - 2⁷ = 75285629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75285767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37642878 + 37642879.

It is an arithmetic number, because the mean of its divisors is an integer number (37642879).

Almost surely, 2^75285757 is an apocalyptic number.

It is an amenable number.

75285757 is a deficient number, since it is larger than the sum of its proper divisors (1).

75285757 is an equidigital number, since it uses as much as digits as its factorization.

75285757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 686000, while the sum is 46.

The square root of 75285757 is about 8676.7365408891. The cubic root of 75285757 is about 422.2512467300.

The spelling of 75285757 in words is "seventy-five million, two hundred eighty-five thousand, seven hundred fifty-seven".