7994557 has 2 divisors, whose sum is σ = 7994558. Its totient is φ = 7994556.

The previous prime is 7994527. The next prime is 7994617. The reversal of 7994557 is 7554997.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7986276 + 8281 = 2826^2 + 91^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7994557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7994527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3997278 + 3997279.

It is an arithmetic number, because the mean of its divisors is an integer number (3997279).

Almost surely, 2^7994557 is an apocalyptic number.

It is an amenable number.

7994557 is a deficient number, since it is larger than the sum of its proper divisors (1).

7994557 is an equidigital number, since it uses as much as digits as its factorization.

7994557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 396900, while the sum is 46.

The square root of 7994557 is about 2827.4647654745. The cubic root of 7994557 is about 199.9546313759.

It can be divided in two parts, 799455 and 7, that multiplied together give a triangular number (5596185 = T₃₃₄₅).

The spelling of 7994557 in words is "seven million, nine hundred ninety-four thousand, five hundred fifty-seven".