48389981 has 2 divisors, whose sum is σ = 48389982. Its totient is φ = 48389980.

The previous prime is 48389911. The next prime is 48389983. The reversal of 48389981 is 18998384.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48372025 + 17956 = 6955^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 48389981 - 2¹⁸ = 48127837 is a prime.

It is a super-2 number, since 2×48389981² = 4683180522360722, which contains 22 as substring.

Together with 48389983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48389983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24194990 + 24194991.

It is an arithmetic number, because the mean of its divisors is an integer number (24194991).

Almost surely, 2^48389981 is an apocalyptic number.

It is an amenable number.

48389981 is a deficient number, since it is larger than the sum of its proper divisors (1).

48389981 is an equidigital number, since it uses as much as digits as its factorization.

48389981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 50.

The square root of 48389981 is about 6956.2907501053. The cubic root of 48389981 is about 364.4056907540.

The spelling of 48389981 in words is "forty-eight million, three hundred eighty-nine thousand, nine hundred eighty-one".