3453340021 has 2 divisors, whose sum is σ = 3453340022. Its totient is φ = 3453340020.

The previous prime is 3453340013. The next prime is 3453340031. The reversal of 3453340021 is 1200433543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3330905796 + 122434225 = 57714^2 + 11065^2 .

It is an emirp because it is prime and its reverse (1200433543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3453340021 - 2³ = 3453340013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3453340001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1726670010 + 1726670011.

It is an arithmetic number, because the mean of its divisors is an integer number (1726670011).

Almost surely, 2^3453340021 is an apocalyptic number.

It is an amenable number.

3453340021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3453340021 is an equidigital number, since it uses as much as digits as its factorization.

3453340021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3453340021 is about 58765.1258911270. The cubic root of 3453340021 is about 1511.5172710177.

Adding to 3453340021 its reverse (1200433543), we get a palindrome (4653773564).

The spelling of 3453340021 in words is "three billion, four hundred fifty-three million, three hundred forty thousand, twenty-one".