4973821 has 2 divisors, whose sum is σ = 4973822. Its totient is φ = 4973820.

The previous prime is 4973807. The next prime is 4973827. The reversal of 4973821 is 1283794.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4536900 + 436921 = 2130^2 + 661^2 .

It is a cyclic number.

It is not a de Polignac number, because 4973821 - 2¹¹ = 4971773 is a prime.

4973821 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4973827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2486910 + 2486911.

It is an arithmetic number, because the mean of its divisors is an integer number (2486911).

Almost surely, 2^4973821 is an apocalyptic number.

It is an amenable number.

4973821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4973821 is an equidigital number, since it uses as much as digits as its factorization.

4973821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 4973821 is about 2230.2064926818. The cubic root of 4973821 is about 170.6986358942.

The spelling of 4973821 in words is "four million, nine hundred seventy-three thousand, eight hundred twenty-one".