10389416621 has 2 divisors, whose sum is σ = 10389416622. Its totient is φ = 10389416620.

The previous prime is 10389416617. The next prime is 10389416623. The reversal of 10389416621 is 12661498301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8315616100 + 2073800521 = 91190^2 + 45539^2 .

It is an emirp because it is prime and its reverse (12661498301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10389416621 - 2² = 10389416617 is a prime.

It is a super-2 number, since 2×10389416621² (a number of 21 digits) contains 22 as substring.

Together with 10389416623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10389416623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5194708310 + 5194708311.

It is an arithmetic number, because the mean of its divisors is an integer number (5194708311).

Almost surely, 2^10389416621 is an apocalyptic number.

It is an amenable number.

10389416621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10389416621 is an equidigital number, since it uses as much as digits as its factorization.

10389416621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 10389416621 in words is "ten billion, three hundred eighty-nine million, four hundred sixteen thousand, six hundred twenty-one".