9413821 has 2 divisors, whose sum is σ = 9413822. Its totient is φ = 9413820.

The previous prime is 9413813. The next prime is 9413837. The reversal of 9413821 is 1283149.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9369721 + 44100 = 3061^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 9413821 - 2³ = 9413813 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9413821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9413851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4706910 + 4706911.

It is an arithmetic number, because the mean of its divisors is an integer number (4706911).

Almost surely, 2^9413821 is an apocalyptic number.

It is an amenable number.

9413821 is a deficient number, since it is larger than the sum of its proper divisors (1).

9413821 is an equidigital number, since it uses as much as digits as its factorization.

9413821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 9413821 is about 3068.1950720252. The cubic root of 9413821 is about 211.1488135084.

The spelling of 9413821 in words is "nine million, four hundred thirteen thousand, eight hundred twenty-one".