4992821 has 2 divisors, whose sum is σ = 4992822. Its totient is φ = 4992820.

The previous prime is 4992809. The next prime is 4992833. The reversal of 4992821 is 1282994.

It is a balanced prime because it is at equal distance from previous prime (4992809) and next prime (4992833).

It can be written as a sum of positive squares in only one way, i.e., 4202500 + 790321 = 2050^2 + 889^2 .

It is a cyclic number.

It is not a de Polignac number, because 4992821 - 2¹⁴ = 4976437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4932821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2496410 + 2496411.

It is an arithmetic number, because the mean of its divisors is an integer number (2496411).

Almost surely, 2^4992821 is an apocalyptic number.

It is an amenable number.

4992821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4992821 is an equidigital number, since it uses as much as digits as its factorization.

4992821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 4992821 is about 2234.4621276719. The cubic root of 4992821 is about 170.9157160192.

The spelling of 4992821 in words is "four million, nine hundred ninety-two thousand, eight hundred twenty-one".