28929161 has 2 divisors, whose sum is σ = 28929162. Its totient is φ = 28929160.

The previous prime is 28929157. The next prime is 28929167. The reversal of 28929161 is 16192982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25200400 + 3728761 = 5020^2 + 1931^2 .

It is a cyclic number.

It is not a de Polignac number, because 28929161 - 2² = 28929157 is a prime.

It is a super-3 number, since 3×28929161³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28929167) 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, 14464580 + 14464581.

It is an arithmetic number, because the mean of its divisors is an integer number (14464581).

Almost surely, 2^28929161 is an apocalyptic number.

It is an amenable number.

28929161 is a deficient number, since it is larger than the sum of its proper divisors (1).

28929161 is an equidigital number, since it uses as much as digits as its factorization.

28929161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 38.

The square root of 28929161 is about 5378.5835495974. The cubic root of 28929161 is about 306.9813178515.

The spelling of 28929161 in words is "twenty-eight million, nine hundred twenty-nine thousand, one hundred sixty-one".