49747981 has 2 divisors, whose sum is σ = 49747982. Its totient is φ = 49747980.

The previous prime is 49747939. The next prime is 49748003. The reversal of 49747981 is 18974794.

49747981 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., 36542025 + 13205956 = 6045^2 + 3634^2 .

It is a cyclic number.

It is not a de Polignac number, because 49747981 - 2⁹ = 49747469 is a prime.

It is a super-2 number, since 2×49747981² = 4949723227152722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49747921) 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, 24873990 + 24873991.

It is an arithmetic number, because the mean of its divisors is an integer number (24873991).

Almost surely, 2^49747981 is an apocalyptic number.

It is an amenable number.

49747981 is a deficient number, since it is larger than the sum of its proper divisors (1).

49747981 is an equidigital number, since it uses as much as digits as its factorization.

49747981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 49.

The square root of 49747981 is about 7053.2248652655. The cubic root of 49747981 is about 367.7831430482.

The spelling of 49747981 in words is "forty-nine million, seven hundred forty-seven thousand, nine hundred eighty-one".