48945781 has 2 divisors, whose sum is σ = 48945782. Its totient is φ = 48945780.

The previous prime is 48945779. The next prime is 48945811. The reversal of 48945781 is 18754984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30747025 + 18198756 = 5545^2 + 4266^2 .

It is a cyclic number.

It is not a de Polignac number, because 48945781 - 2¹ = 48945779 is a prime.

It is a super-2 number, since 2×48945781² = 4791378955399922, which contains 22 as substring.

Together with 48945779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48945731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24472890 + 24472891.

It is an arithmetic number, because the mean of its divisors is an integer number (24472891).

Almost surely, 2^48945781 is an apocalyptic number.

It is an amenable number.

48945781 is a deficient number, since it is larger than the sum of its proper divisors (1).

48945781 is an equidigital number, since it uses as much as digits as its factorization.

48945781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 46.

The square root of 48945781 is about 6996.1261423734. The cubic root of 48945781 is about 365.7955525533.

The spelling of 48945781 in words is "forty-eight million, nine hundred forty-five thousand, seven hundred eighty-one".