93340781 has 2 divisors, whose sum is σ = 93340782. Its totient is φ = 93340780.

The previous prime is 93340777. The next prime is 93340817. The reversal of 93340781 is 18704339.

Together with next prime (93340817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69973225 + 23367556 = 8365^2 + 4834^2 .

It is an emirp because it is prime and its reverse (18704339) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 93340781 - 2² = 93340777 is a prime.

It is a super-2 number, since 2×93340781² = 17425002795379922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93340771) 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, 46670390 + 46670391.

It is an arithmetic number, because the mean of its divisors is an integer number (46670391).

Almost surely, 2^93340781 is an apocalyptic number.

It is an amenable number.

93340781 is a deficient number, since it is larger than the sum of its proper divisors (1).

93340781 is an equidigital number, since it uses as much as digits as its factorization.

93340781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 93340781 is about 9661.3032764736. The cubic root of 93340781 is about 453.6182061260.

It can be divided in two parts, 933 and 40781, that added together give a palindrome (41714).

The spelling of 93340781 in words is "ninety-three million, three hundred forty thousand, seven hundred eighty-one".