49997947 has 6 divisors (see below), whose sum is σ = 51663804. Its totient is φ = 48384180.

The previous prime is 49997933. The next prime is 49997953. The reversal of 49997947 is 74979994.

It is not a de Polignac number, because 49997947 - 2¹¹ = 49995899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49997891 and 49997900.

It is not an unprimeable number, because it can be changed into a prime (49997977) 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 in 5 ways as a sum of consecutive naturals, for example, 25053 + ... + 26974.

It is an arithmetic number, because the mean of its divisors is an integer number (8610634).

Almost surely, 2^49997947 is an apocalyptic number.

49997947 is a deficient number, since it is larger than the sum of its proper divisors (1665857).

49997947 is an equidigital number, since it uses as much as digits as its factorization.

49997947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52089 (or 52058 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 58.

The square root of 49997947 is about 7070.9226413531. The cubic root of 49997947 is about 368.3981075839.

The spelling of 49997947 in words is "forty-nine million, nine hundred ninety-seven thousand, nine hundred forty-seven".