49387729 has 2 divisors, whose sum is σ = 49387730. Its totient is φ = 49387728.

The previous prime is 49387697. The next prime is 49387753. The reversal of 49387729 is 92778394.

49387729 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., 48274704 + 1113025 = 6948^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 49387729 - 2⁵ = 49387697 is a prime.

It is not a weakly prime, because it can be changed into another prime (49387759) 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, 24693864 + 24693865.

It is an arithmetic number, because the mean of its divisors is an integer number (24693865).

Almost surely, 2^49387729 is an apocalyptic number.

It is an amenable number.

49387729 is a deficient number, since it is larger than the sum of its proper divisors (1).

49387729 is an equidigital number, since it uses as much as digits as its factorization.

49387729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The square root of 49387729 is about 7027.6403579011. The cubic root of 49387729 is about 366.8932193114.

The spelling of 49387729 in words is "forty-nine million, three hundred eighty-seven thousand, seven hundred twenty-nine".