34319981 has 2 divisors, whose sum is σ = 34319982. Its totient is φ = 34319980.

The previous prime is 34319959. The next prime is 34320017. The reversal of 34319981 is 18991343.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21114025 + 13205956 = 4595^2 + 3634^2 .

It is a cyclic number.

It is not a de Polignac number, because 34319981 - 2¹⁰ = 34318957 is a prime.

It is a super-2 number, since 2×34319981² = 2355722191680722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34319921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17159990 + 17159991.

It is an arithmetic number, because the mean of its divisors is an integer number (17159991).

Almost surely, 2^34319981 is an apocalyptic number.

It is an amenable number.

34319981 is a deficient number, since it is larger than the sum of its proper divisors (1).

34319981 is an equidigital number, since it uses as much as digits as its factorization.

34319981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 34319981 is about 5858.3257847272. The cubic root of 34319981 is about 324.9742969811.

The spelling of 34319981 in words is "thirty-four million, three hundred nineteen thousand, nine hundred eighty-one".