49898021 has 2 divisors, whose sum is σ = 49898022. Its totient is φ = 49898020.

The previous prime is 49897997. The next prime is 49898029. The reversal of 49898021 is 12089894.

49898021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31528225 + 18369796 = 5615^2 + 4286^2 .

It is a cyclic number.

It is not a de Polignac number, because 49898021 - 2⁶ = 49897957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49898021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49898029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24949010 + 24949011.

It is an arithmetic number, because the mean of its divisors is an integer number (24949011).

Almost surely, 2^49898021 is an apocalyptic number.

It is an amenable number.

49898021 is a deficient number, since it is larger than the sum of its proper divisors (1).

49898021 is an equidigital number, since it uses as much as digits as its factorization.

49898021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 49898021 is about 7063.8531270122. The cubic root of 49898021 is about 368.1525168259.

The spelling of 49898021 in words is "forty-nine million, eight hundred ninety-eight thousand, twenty-one".