34205981 has 4 divisors (see below), whose sum is σ = 34223712. Its totient is φ = 34188252.

The previous prime is 34205939. The next prime is 34205987. The reversal of 34205981 is 18950243.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34205981 is a prime.

It is a super-2 number, since 2×34205981² = 2340098272344722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34205987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5561 + ... + 9966.

It is an arithmetic number, because the mean of its divisors is an integer number (8555928).

Almost surely, 2^34205981 is an apocalyptic number.

It is an amenable number.

34205981 is a deficient number, since it is larger than the sum of its proper divisors (17731).

34205981 is a wasteful number, since it uses less digits than its factorization.

34205981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17730.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 34205981 is about 5848.5879492404. The cubic root of 34205981 is about 324.6140776167.

The spelling of 34205981 in words is "thirty-four million, two hundred five thousand, nine hundred eighty-one".