49442821 has 2 divisors, whose sum is σ = 49442822. Its totient is φ = 49442820.

The previous prime is 49442791. The next prime is 49442831. The reversal of 49442821 is 12824494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28740321 + 20702500 = 5361^2 + 4550^2 .

It is a cyclic number.

It is not a de Polignac number, because 49442821 - 2¹⁷ = 49311749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49442831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24721410 + 24721411.

It is an arithmetic number, because the mean of its divisors is an integer number (24721411).

Almost surely, 2^49442821 is an apocalyptic number.

It is an amenable number.

49442821 is a deficient number, since it is larger than the sum of its proper divisors (1).

49442821 is an equidigital number, since it uses as much as digits as its factorization.

49442821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 34.

The square root of 49442821 is about 7031.5589309911. The cubic root of 49442821 is about 367.0295917159.

The spelling of 49442821 in words is "forty-nine million, four hundred forty-two thousand, eight hundred twenty-one".