7825717 has 2 divisors, whose sum is σ = 7825718. Its totient is φ = 7825716.

The previous prime is 7825709. The next prime is 7825723. The reversal of 7825717 is 7175287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4104676 + 3721041 = 2026^2 + 1929^2 .

It is a cyclic number.

It is not a de Polignac number, because 7825717 - 2³ = 7825709 is a prime.

It is a super-2 number, since 2×7825717² = 122483693128178, which contains 22 as substring.

7825717 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7825747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3912858 + 3912859.

It is an arithmetic number, because the mean of its divisors is an integer number (3912859).

Almost surely, 2^7825717 is an apocalyptic number.

It is an amenable number.

7825717 is a deficient number, since it is larger than the sum of its proper divisors (1).

7825717 is an equidigital number, since it uses as much as digits as its factorization.

7825717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27440, while the sum is 37.

The square root of 7825717 is about 2797.4483015777. The cubic root of 7825717 is about 198.5369654122.

The spelling of 7825717 in words is "seven million, eight hundred twenty-five thousand, seven hundred seventeen".