9413890105621 has 2 divisors, whose sum is σ = 9413890105622. Its totient is φ = 9413890105620.

The previous prime is 9413890105553. The next prime is 9413890105663. The reversal of 9413890105621 is 1265010983149.

It is a happy number.

9413890105621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5135979712900 + 4277910392721 = 2266270^2 + 2068311^2 .

It is a cyclic number.

It is not a de Polignac number, because 9413890105621 - 2¹³ = 9413890097429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9413890105121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4706945052810 + 4706945052811.

It is an arithmetic number, because the mean of its divisors is an integer number (4706945052811).

Almost surely, 2^{9413890105621} is an apocalyptic number.

It is an amenable number.

9413890105621 is a deficient number, since it is larger than the sum of its proper divisors (1).

9413890105621 is an equidigital number, since it uses as much as digits as its factorization.

9413890105621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 9413890105621 in words is "nine trillion, four hundred thirteen billion, eight hundred ninety million, one hundred five thousand, six hundred twenty-one".