7971853 has 2 divisors, whose sum is σ = 7971854. Its totient is φ = 7971852.

The previous prime is 7971851. The next prime is 7971871. The reversal of 7971853 is 3581797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4235364 + 3736489 = 2058^2 + 1933^2 .

It is a cyclic number.

It is not a de Polignac number, because 7971853 - 2¹ = 7971851 is a prime.

Together with 7971851, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7971851) 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, 3985926 + 3985927.

It is an arithmetic number, because the mean of its divisors is an integer number (3985927).

Almost surely, 2^7971853 is an apocalyptic number.

It is an amenable number.

7971853 is a deficient number, since it is larger than the sum of its proper divisors (1).

7971853 is an equidigital number, since it uses as much as digits as its factorization.

7971853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 40.

The square root of 7971853 is about 2823.4470067632. The cubic root of 7971853 is about 199.7651660396.

The spelling of 7971853 in words is "seven million, nine hundred seventy-one thousand, eight hundred fifty-three".