47320121 has 2 divisors, whose sum is σ = 47320122. Its totient is φ = 47320120.

The previous prime is 47320111. The next prime is 47320139. The reversal of 47320121 is 12102374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30958096 + 16362025 = 5564^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 47320121 - 2⁶ = 47320057 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47320093 and 47320102.

It is not a weakly prime, because it can be changed into another prime (47320111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23660060 + 23660061.

It is an arithmetic number, because the mean of its divisors is an integer number (23660061).

Almost surely, 2^47320121 is an apocalyptic number.

It is an amenable number.

47320121 is a deficient number, since it is larger than the sum of its proper divisors (1).

47320121 is an equidigital number, since it uses as much as digits as its factorization.

47320121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 47320121 is about 6878.9622037049. The cubic root of 47320121 is about 361.7000888884.

Adding to 47320121 its reverse (12102374), we get a palindrome (59422495).

The spelling of 47320121 in words is "forty-seven million, three hundred twenty thousand, one hundred twenty-one".