28934993 has 2 divisors, whose sum is σ = 28934994. Its totient is φ = 28934992.

The previous prime is 28934981. The next prime is 28935007. The reversal of 28934993 is 39943982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18905104 + 10029889 = 4348^2 + 3167^2 .

It is a cyclic number.

It is not a de Polignac number, because 28934993 - 2⁴ = 28934977 is a prime.

It is a super-3 number, since 3×28934993³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28934933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14467496 + 14467497.

It is an arithmetic number, because the mean of its divisors is an integer number (14467497).

Almost surely, 2^28934993 is an apocalyptic number.

It is an amenable number.

28934993 is a deficient number, since it is larger than the sum of its proper divisors (1).

28934993 is an equidigital number, since it uses as much as digits as its factorization.

28934993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 47.

The square root of 28934993 is about 5379.1256724490. The cubic root of 28934993 is about 307.0019451896.

The spelling of 28934993 in words is "twenty-eight million, nine hundred thirty-four thousand, nine hundred ninety-three".