49864781 has 2 divisors, whose sum is σ = 49864782. Its totient is φ = 49864780.

The previous prime is 49864739. The next prime is 49864847. The reversal of 49864781 is 18746894.

49864781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44342281 + 5522500 = 6659^2 + 2350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49864781 is a prime.

It is a super-2 number, since 2×49864781² = 4972992768355922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49864181) 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, 24932390 + 24932391.

It is an arithmetic number, because the mean of its divisors is an integer number (24932391).

Almost surely, 2^49864781 is an apocalyptic number.

It is an amenable number.

49864781 is a deficient number, since it is larger than the sum of its proper divisors (1).

49864781 is an equidigital number, since it uses as much as digits as its factorization.

49864781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 47.

The square root of 49864781 is about 7061.4999114919. The cubic root of 49864781 is about 368.0707493345.

The spelling of 49864781 in words is "forty-nine million, eight hundred sixty-four thousand, seven hundred eighty-one".