28949773 has 2 divisors, whose sum is σ = 28949774. Its totient is φ = 28949772.

The previous prime is 28949771. The next prime is 28949779. The reversal of 28949773 is 37794982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27688644 + 1261129 = 5262^2 + 1123^2 .

It is a cyclic number.

It is not a de Polignac number, because 28949773 - 2¹ = 28949771 is a prime.

Together with 28949771, 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 (28949771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14474886 + 14474887.

It is an arithmetic number, because the mean of its divisors is an integer number (14474887).

Almost surely, 2^28949773 is an apocalyptic number.

It is an amenable number.

28949773 is a deficient number, since it is larger than the sum of its proper divisors (1).

28949773 is an equidigital number, since it uses as much as digits as its factorization.

28949773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The square root of 28949773 is about 5380.4993262708. The cubic root of 28949773 is about 307.0542085095.

The spelling of 28949773 in words is "twenty-eight million, nine hundred forty-nine thousand, seven hundred seventy-three".