4821389 has 2 divisors, whose sum is σ = 4821390. Its totient is φ = 4821388.

The previous prime is 4821373. The next prime is 4821407. The reversal of 4821389 is 9831284.

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., 4818025 + 3364 = 2195^2 + 58^2 .

It is a cyclic number.

It is not a de Polignac number, because 4821389 - 2⁴ = 4821373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4821689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2410694 + 2410695.

It is an arithmetic number, because the mean of its divisors is an integer number (2410695).

Almost surely, 2^4821389 is an apocalyptic number.

It is an amenable number.

4821389 is a deficient number, since it is larger than the sum of its proper divisors (1).

4821389 is an equidigital number, since it uses as much as digits as its factorization.

4821389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 4821389 is about 2195.7661533050. The cubic root of 4821389 is about 168.9367198865.

The spelling of 4821389 in words is "four million, eight hundred twenty-one thousand, three hundred eighty-nine".