75256717 has 2 divisors, whose sum is σ = 75256718. Its totient is φ = 75256716.

The previous prime is 75256693. The next prime is 75256721. The reversal of 75256717 is 71765257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45346756 + 29909961 = 6734^2 + 5469^2 .

It is a cyclic number.

It is not a de Polignac number, because 75256717 - 2⁷ = 75256589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75256717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75256787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37628358 + 37628359.

It is an arithmetic number, because the mean of its divisors is an integer number (37628359).

Almost surely, 2^75256717 is an apocalyptic number.

It is an amenable number.

75256717 is a deficient number, since it is larger than the sum of its proper divisors (1).

75256717 is an equidigital number, since it uses as much as digits as its factorization.

75256717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102900, while the sum is 40.

The square root of 75256717 is about 8675.0629392529. The cubic root of 75256717 is about 422.1969480434.

The spelling of 75256717 in words is "seventy-five million, two hundred fifty-six thousand, seven hundred seventeen".