49321381 has 2 divisors, whose sum is σ = 49321382. Its totient is φ = 49321380.

The previous prime is 49321379. The next prime is 49321399. The reversal of 49321381 is 18312394.

49321381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37822500 + 11498881 = 6150^2 + 3391^2 .

It is a cyclic number.

It is not a de Polignac number, because 49321381 - 2¹ = 49321379 is a prime.

It is a super-2 number, since 2×49321381² = 4865197247494322, which contains 22 as substring.

Together with 49321379, 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 (49321351) 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, 24660690 + 24660691.

It is an arithmetic number, because the mean of its divisors is an integer number (24660691).

Almost surely, 2^49321381 is an apocalyptic number.

It is an amenable number.

49321381 is a deficient number, since it is larger than the sum of its proper divisors (1).

49321381 is an equidigital number, since it uses as much as digits as its factorization.

49321381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 49321381 is about 7022.9182680706. The cubic root of 49321381 is about 366.7288496007.

The spelling of 49321381 in words is "forty-nine million, three hundred twenty-one thousand, three hundred eighty-one".