9461821 has 2 divisors, whose sum is σ = 9461822. Its totient is φ = 9461820.

The previous prime is 9461819. The next prime is 9461827. The reversal of 9461821 is 1281649.

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., 5405625 + 4056196 = 2325^2 + 2014^2 .

It is an emirp because it is prime and its reverse (1281649) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9461821 - 2¹ = 9461819 is a prime.

Together with 9461819, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9461827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4730910 + 4730911.

It is an arithmetic number, because the mean of its divisors is an integer number (4730911).

Almost surely, 2^9461821 is an apocalyptic number.

It is an amenable number.

9461821 is a deficient number, since it is larger than the sum of its proper divisors (1).

9461821 is an equidigital number, since it uses as much as digits as its factorization.

9461821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 9461821 is about 3076.0073146857. The cubic root of 9461821 is about 211.5070798525.

The spelling of 9461821 in words is "nine million, four hundred sixty-one thousand, eight hundred twenty-one".