48761981 has 2 divisors, whose sum is σ = 48761982. Its totient is φ = 48761980.

The previous prime is 48761971. The next prime is 48761987. The reversal of 48761981 is 18916784.

48761981 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., 47045881 + 1716100 = 6859^2 + 1310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-48761981 is a prime.

It is a super-2 number, since 2×48761981² = 4755461582088722, 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 (48761987) 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, 24380990 + 24380991.

It is an arithmetic number, because the mean of its divisors is an integer number (24380991).

Almost surely, 2^48761981 is an apocalyptic number.

It is an amenable number.

48761981 is a deficient number, since it is larger than the sum of its proper divisors (1).

48761981 is an equidigital number, since it uses as much as digits as its factorization.

48761981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 48761981 is about 6982.9779464065. The cubic root of 48761981 is about 365.3371027155.

The spelling of 48761981 in words is "forty-eight million, seven hundred sixty-one thousand, nine hundred eighty-one".