47000081 has 2 divisors, whose sum is σ = 47000082. Its totient is φ = 47000080.

The previous prime is 47000077. The next prime is 47000117. The reversal of 47000081 is 18000074.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24910081 + 22090000 = 4991^2 + 4700^2 .

It is a cyclic number.

It is not a de Polignac number, because 47000081 - 2² = 47000077 is a prime.

It is a super-2 number, since 2×47000081² = 4418015228013122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47000011) 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, 23500040 + 23500041.

It is an arithmetic number, because the mean of its divisors is an integer number (23500041).

Almost surely, 2^47000081 is an apocalyptic number.

It is an amenable number.

47000081 is a deficient number, since it is larger than the sum of its proper divisors (1).

47000081 is an equidigital number, since it uses as much as digits as its factorization.

47000081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 47000081 is about 6855.6605079307. The cubic root of 47000081 is about 360.8828153293.

The spelling of 47000081 in words is "forty-seven million, eighty-one", and thus it is an aban number and an uban number.