8243957 has 2 divisors, whose sum is σ = 8243958. Its totient is φ = 8243956.

The previous prime is 8243953. The next prime is 8243971. The reversal of 8243957 is 7593428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7789681 + 454276 = 2791^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 8243957 - 2² = 8243953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8243957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8243953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4121978 + 4121979.

It is an arithmetic number, because the mean of its divisors is an integer number (4121979).

Almost surely, 2^8243957 is an apocalyptic number.

It is an amenable number.

8243957 is a deficient number, since it is larger than the sum of its proper divisors (1).

8243957 is an equidigital number, since it uses as much as digits as its factorization.

8243957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 8243957 is about 2871.2291792889. The cubic root of 8243957 is about 202.0126531956.

The spelling of 8243957 in words is "eight million, two hundred forty-three thousand, nine hundred fifty-seven".