34153981 has 4 divisors (see below), whose sum is σ = 34166464. Its totient is φ = 34141500.

The previous prime is 34153949. The next prime is 34154009. The reversal of 34153981 is 18935143.

34153981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18935143 = 4283 ⋅4421.

It is a cyclic number.

It is not a de Polignac number, because 34153981 - 2⁵ = 34153949 is a prime.

It is a super-2 number, since 2×34153981² = 2332988836296722, 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 (34153921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165 + ... + 8266.

It is an arithmetic number, because the mean of its divisors is an integer number (8541616).

Almost surely, 2^34153981 is an apocalyptic number.

It is an amenable number.

34153981 is a deficient number, since it is larger than the sum of its proper divisors (12483).

34153981 is an equidigital number, since it uses as much as digits as its factorization.

34153981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12482.

The product of its digits is 12960, while the sum is 34.

The square root of 34153981 is about 5844.1407409473. The cubic root of 34153981 is about 324.4495012043.

It can be divided in two parts, 3415 and 3981, that added together give a square (7396 = 86²).

The spelling of 34153981 in words is "thirty-four million, one hundred fifty-three thousand, nine hundred eighty-one".