34019981 has 2 divisors, whose sum is σ = 34019982. Its totient is φ = 34019980.

The previous prime is 34019969. The next prime is 34020001. The reversal of 34019981 is 18991043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32959081 + 1060900 = 5741^2 + 1030^2 .

It is an emirp because it is prime and its reverse (18991043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34019981 is a prime.

It is a super-2 number, since 2×34019981² = 2314718214480722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34019281) 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, 17009990 + 17009991.

It is an arithmetic number, because the mean of its divisors is an integer number (17009991).

Almost surely, 2^34019981 is an apocalyptic number.

It is an amenable number.

34019981 is a deficient number, since it is larger than the sum of its proper divisors (1).

34019981 is an equidigital number, since it uses as much as digits as its factorization.

34019981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 34019981 is about 5832.6649998093. The cubic root of 34019981 is about 324.0246291545.

The spelling of 34019981 in words is "thirty-four million, nineteen thousand, nine hundred eighty-one".