344335021 has 2 divisors, whose sum is σ = 344335022. Its totient is φ = 344335020.

The previous prime is 344335007. The next prime is 344335111. The reversal of 344335021 is 120533443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264875625 + 79459396 = 16275^2 + 8914^2 .

It is a cyclic number.

It is not a de Polignac number, because 344335021 - 2⁵ = 344334989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344315021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172167510 + 172167511.

It is an arithmetic number, because the mean of its divisors is an integer number (172167511).

Almost surely, 2^344335021 is an apocalyptic number.

It is an amenable number.

344335021 is a deficient number, since it is larger than the sum of its proper divisors (1).

344335021 is an equidigital number, since it uses as much as digits as its factorization.

344335021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 344335021 is about 18556.2663539840. The cubic root of 344335021 is about 700.9070018258.

Adding to 344335021 its reverse (120533443), we get a palindrome (464868464).

The spelling of 344335021 in words is "three hundred forty-four million, three hundred thirty-five thousand, twenty-one".