4909321 has 2 divisors, whose sum is σ = 4909322. Its totient is φ = 4909320.

The previous prime is 4909319. The next prime is 4909343. The reversal of 4909321 is 1239094.

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., 3980025 + 929296 = 1995^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 4909321 - 2¹ = 4909319 is a prime.

Together with 4909319, 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 4909321.

It is not a weakly prime, because it can be changed into another prime (4909301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2454660 + 2454661.

It is an arithmetic number, because the mean of its divisors is an integer number (2454661).

Almost surely, 2^4909321 is an apocalyptic number.

It is an amenable number.

4909321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4909321 is an equidigital number, since it uses as much as digits as its factorization.

4909321 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 4909321 is about 2215.6987611135. The cubic root of 4909321 is about 169.9575557244.

The spelling of 4909321 in words is "four million, nine hundred nine thousand, three hundred twenty-one".