34081781 has 2 divisors, whose sum is σ = 34081782. Its totient is φ = 34081780.

The previous prime is 34081777. The next prime is 34081799. The reversal of 34081781 is 18718043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34035556 + 46225 = 5834^2 + 215^2 .

It is an emirp because it is prime and its reverse (18718043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34081781 - 2² = 34081777 is a prime.

It is a super-2 number, since 2×34081781² = 2323135592263922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34081711) 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, 17040890 + 17040891.

It is an arithmetic number, because the mean of its divisors is an integer number (17040891).

Almost surely, 2^34081781 is an apocalyptic number.

It is an amenable number.

34081781 is a deficient number, since it is larger than the sum of its proper divisors (1).

34081781 is an equidigital number, since it uses as much as digits as its factorization.

34081781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 34081781 is about 5837.9603458742. The cubic root of 34081781 is about 324.2207159660.

The spelling of 34081781 in words is "thirty-four million, eighty-one thousand, seven hundred eighty-one".