7921153 has 2 divisors, whose sum is σ = 7921154. Its totient is φ = 7921152.

The previous prime is 7921141. The next prime is 7921169. The reversal of 7921153 is 3511297.

7921153 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7683984 + 237169 = 2772^2 + 487^2 .

It is an emirp because it is prime and its reverse (3511297) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7921153 - 2⁹ = 7920641 is a prime.

7921153 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7928153) 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, 3960576 + 3960577.

It is an arithmetic number, because the mean of its divisors is an integer number (3960577).

Almost surely, 2^7921153 is an apocalyptic number.

It is an amenable number.

7921153 is a deficient number, since it is larger than the sum of its proper divisors (1).

7921153 is an equidigital number, since it uses as much as digits as its factorization.

7921153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 28.

The square root of 7921153 is about 2814.4542987940. The cubic root of 7921153 is about 199.3407711406.

The spelling of 7921153 in words is "seven million, nine hundred twenty-one thousand, one hundred fifty-three".