28927973 has 2 divisors, whose sum is σ = 28927974. Its totient is φ = 28927972.

The previous prime is 28927957. The next prime is 28928021. The reversal of 28927973 is 37972982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23833924 + 5094049 = 4882^2 + 2257^2 .

It is a cyclic number.

It is not a de Polignac number, because 28927973 - 2⁴ = 28927957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28927373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14463986 + 14463987.

It is an arithmetic number, because the mean of its divisors is an integer number (14463987).

Almost surely, 2^28927973 is an apocalyptic number.

It is an amenable number.

28927973 is a deficient number, since it is larger than the sum of its proper divisors (1).

28927973 is an equidigital number, since it uses as much as digits as its factorization.

28927973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 28927973 is about 5378.4731104655. The cubic root of 28927973 is about 306.9771156465.

The spelling of 28927973 in words is "twenty-eight million, nine hundred twenty-seven thousand, nine hundred seventy-three".