49871729 has 2 divisors, whose sum is σ = 49871730. Its totient is φ = 49871728.

The previous prime is 49871687. The next prime is 49871753. The reversal of 49871729 is 92717894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48720400 + 1151329 = 6980^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 49871729 - 2¹² = 49867633 is a prime.

It is a super-4 number, since 4×49871729⁴ (a number of 32 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (49831729) 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, 24935864 + 24935865.

It is an arithmetic number, because the mean of its divisors is an integer number (24935865).

Almost surely, 2^49871729 is an apocalyptic number.

It is an amenable number.

49871729 is a deficient number, since it is larger than the sum of its proper divisors (1).

49871729 is an equidigital number, since it uses as much as digits as its factorization.

49871729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The square root of 49871729 is about 7061.9918578259. The cubic root of 49871729 is about 368.0878438097.

It can be divided in two parts, 498 and 71729, that added together give a palindrome (72227).

The spelling of 49871729 in words is "forty-nine million, eight hundred seventy-one thousand, seven hundred twenty-nine".