84781093 has 2 divisors, whose sum is σ = 84781094. Its totient is φ = 84781092.

The previous prime is 84781087. The next prime is 84781111. The reversal of 84781093 is 39018748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84309124 + 471969 = 9182^2 + 687^2 .

It is a cyclic number.

It is not a de Polignac number, because 84781093 - 2⁵ = 84781061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84781003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42390546 + 42390547.

It is an arithmetic number, because the mean of its divisors is an integer number (42390547).

Almost surely, 2^84781093 is an apocalyptic number.

It is an amenable number.

84781093 is a deficient number, since it is larger than the sum of its proper divisors (1).

84781093 is an equidigital number, since it uses as much as digits as its factorization.

84781093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 84781093 is about 9207.6649048497. The cubic root of 84781093 is about 439.3051930036.

The spelling of 84781093 in words is "eighty-four million, seven hundred eighty-one thousand, ninety-three".