28923161 has 2 divisors, whose sum is σ = 28923162. Its totient is φ = 28923160.

The previous prime is 28923143. The next prime is 28923203. The reversal of 28923161 is 16132982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20976400 + 7946761 = 4580^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 28923161 - 2²² = 24728857 is a prime.

It is equal to p_1795244 and since 28923161 and 1795244 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28923061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14461580 + 14461581.

It is an arithmetic number, because the mean of its divisors is an integer number (14461581).

Almost surely, 2^28923161 is an apocalyptic number.

It is an amenable number.

28923161 is a deficient number, since it is larger than the sum of its proper divisors (1).

28923161 is an equidigital number, since it uses as much as digits as its factorization.

28923161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 28923161 is about 5378.0257530064. The cubic root of 28923161 is about 306.9600934169.

The spelling of 28923161 in words is "twenty-eight million, nine hundred twenty-three thousand, one hundred sixty-one".