49721849 has 2 divisors, whose sum is σ = 49721850. Its totient is φ = 49721848.

The previous prime is 49721813. The next prime is 49721851. The reversal of 49721849 is 94812794.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26988025 + 22733824 = 5195^2 + 4768^2 .

It is a cyclic number.

It is not a de Polignac number, because 49721849 - 2¹² = 49717753 is a prime.

Together with 49721851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49721809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24860924 + 24860925.

It is an arithmetic number, because the mean of its divisors is an integer number (24860925).

Almost surely, 2^49721849 is an apocalyptic number.

It is an amenable number.

49721849 is a deficient number, since it is larger than the sum of its proper divisors (1).

49721849 is an equidigital number, since it uses as much as digits as its factorization.

49721849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 49721849 is about 7051.3721359747. The cubic root of 49721849 is about 367.7187344549.

The spelling of 49721849 in words is "forty-nine million, seven hundred twenty-one thousand, eight hundred forty-nine".