48013781 has 2 divisors, whose sum is σ = 48013782. Its totient is φ = 48013780.

The previous prime is 48013733. The next prime is 48013783. The reversal of 48013781 is 18731084.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45778756 + 2235025 = 6766^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 48013781 - 2⁶ = 48013717 is a prime.

It is a super-2 number, since 2×48013781² = 4610646331831922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 48013783, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48013783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24006890 + 24006891.

It is an arithmetic number, because the mean of its divisors is an integer number (24006891).

Almost surely, 2^48013781 is an apocalyptic number.

It is an amenable number.

48013781 is a deficient number, since it is larger than the sum of its proper divisors (1).

48013781 is an equidigital number, since it uses as much as digits as its factorization.

48013781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 48013781 is about 6929.1977169078. The cubic root of 48013781 is about 363.4588954313.

The spelling of 48013781 in words is "forty-eight million, thirteen thousand, seven hundred eighty-one".