7923857 has 2 divisors, whose sum is σ = 7923858. Its totient is φ = 7923856.

The previous prime is 7923847. The next prime is 7923863. The reversal of 7923857 is 7583297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4393216 + 3530641 = 2096^2 + 1879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7923857 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 7 + 9⁶ + 2¹⁵ + 3¹³ + 8³ + 5 + 7⁸ .

It is not a weakly prime, because it can be changed into another prime (7923827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3961928 + 3961929.

It is an arithmetic number, because the mean of its divisors is an integer number (3961929).

Almost surely, 2^7923857 is an apocalyptic number.

It is an amenable number.

7923857 is a deficient number, since it is larger than the sum of its proper divisors (1).

7923857 is an equidigital number, since it uses as much as digits as its factorization.

7923857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 7923857 is about 2814.9346351203. The cubic root of 7923857 is about 199.3634511774.

The spelling of 7923857 in words is "seven million, nine hundred twenty-three thousand, eight hundred fifty-seven".