34043621 has 2 divisors, whose sum is σ = 34043622. Its totient is φ = 34043620.

The previous prime is 34043617. The next prime is 34043627. The reversal of 34043621 is 12634043.

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., 31528225 + 2515396 = 5615^2 + 1586^2 .

It is a cyclic number.

It is not a de Polignac number, because 34043621 - 2² = 34043617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34043627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17021810 + 17021811.

It is an arithmetic number, because the mean of its divisors is an integer number (17021811).

Almost surely, 2^34043621 is an apocalyptic number.

It is an amenable number.

34043621 is a deficient number, since it is larger than the sum of its proper divisors (1).

34043621 is an equidigital number, since it uses as much as digits as its factorization.

34043621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 34043621 is about 5834.6911657773. The cubic root of 34043621 is about 324.0996651425.

Adding to 34043621 its reverse (12634043), we get a palindrome (46677664).

The spelling of 34043621 in words is "thirty-four million, forty-three thousand, six hundred twenty-one".