3301291621 has 2 divisors, whose sum is σ = 3301291622. Its totient is φ = 3301291620.

The previous prime is 3301291619. The next prime is 3301291633. The reversal of 3301291621 is 1261921033.

3301291621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2482530625 + 818760996 = 49825^2 + 28614^2 .

It is a cyclic number.

It is not a de Polignac number, because 3301291621 - 2¹ = 3301291619 is a prime.

Together with 3301291619, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3301291621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3301291691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1650645810 + 1650645811.

It is an arithmetic number, because the mean of its divisors is an integer number (1650645811).

Almost surely, 2^3301291621 is an apocalyptic number.

It is an amenable number.

3301291621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3301291621 is an equidigital number, since it uses as much as digits as its factorization.

3301291621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 3301291621 is about 57456.8674833566. The cubic root of 3301291621 is about 1488.9997672657. Note that the first 3 decimals are identical.

The spelling of 3301291621 in words is "three billion, three hundred one million, two hundred ninety-one thousand, six hundred twenty-one".