49992721 has 2 divisors, whose sum is σ = 49992722. Its totient is φ = 49992720.

The previous prime is 49992697. The next prime is 49992737. The reversal of 49992721 is 12729994.

49992721 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., 33223696 + 16769025 = 5764^2 + 4095^2 .

It is a cyclic number.

It is not a de Polignac number, because 49992721 - 2⁵ = 49992689 is a prime.

It is not a weakly prime, because it can be changed into another prime (49992791) 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, 24996360 + 24996361.

It is an arithmetic number, because the mean of its divisors is an integer number (24996361).

Almost surely, 2^49992721 is an apocalyptic number.

It is an amenable number.

49992721 is a deficient number, since it is larger than the sum of its proper divisors (1).

49992721 is an equidigital number, since it uses as much as digits as its factorization.

49992721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 49992721 is about 7070.5530901055. The cubic root of 49992721 is about 368.3852716196.

The spelling of 49992721 in words is "forty-nine million, nine hundred ninety-two thousand, seven hundred twenty-one".