34181621 has 2 divisors, whose sum is σ = 34181622. Its totient is φ = 34181620.

The previous prime is 34181579. The next prime is 34181639. The reversal of 34181621 is 12618143.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33988900 + 192721 = 5830^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 34181621 - 2⁶ = 34181557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34181681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17090810 + 17090811.

It is an arithmetic number, because the mean of its divisors is an integer number (17090811).

Almost surely, 2^34181621 is an apocalyptic number.

It is an amenable number.

34181621 is a deficient number, since it is larger than the sum of its proper divisors (1).

34181621 is an equidigital number, since it uses as much as digits as its factorization.

34181621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 34181621 is about 5846.5050243714. The cubic root of 34181621 is about 324.5370006788.

Adding to 34181621 its reverse (12618143), we get a palindrome (46799764).

The spelling of 34181621 in words is "thirty-four million, one hundred eighty-one thousand, six hundred twenty-one".