28937093 has 2 divisors, whose sum is σ = 28937094. Its totient is φ = 28937092.

The previous prime is 28937089. The next prime is 28937107. The reversal of 28937093 is 39073982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28912129 + 24964 = 5377^2 + 158^2 .

It is a cyclic number.

It is not a de Polignac number, because 28937093 - 2² = 28937089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28937093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28937063) 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, 14468546 + 14468547.

It is an arithmetic number, because the mean of its divisors is an integer number (14468547).

Almost surely, 2^28937093 is an apocalyptic number.

It is an amenable number.

28937093 is a deficient number, since it is larger than the sum of its proper divisors (1).

28937093 is an equidigital number, since it uses as much as digits as its factorization.

28937093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 28937093 is about 5379.3208679163. The cubic root of 28937093 is about 307.0093720503.

The spelling of 28937093 in words is "twenty-eight million, nine hundred thirty-seven thousand, ninety-three".