47146861 has 2 divisors, whose sum is σ = 47146862. Its totient is φ = 47146860.

The previous prime is 47146859. The next prime is 47146867. The reversal of 47146861 is 16864174.

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., 32661225 + 14485636 = 5715^2 + 3806^2 .

It is a cyclic number.

It is not a de Polignac number, because 47146861 - 2¹ = 47146859 is a prime.

Together with 47146859, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47146861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47146867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23573430 + 23573431.

It is an arithmetic number, because the mean of its divisors is an integer number (23573431).

Almost surely, 2^47146861 is an apocalyptic number.

It is an amenable number.

47146861 is a deficient number, since it is larger than the sum of its proper divisors (1).

47146861 is an equidigital number, since it uses as much as digits as its factorization.

47146861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 47146861 is about 6866.3571855825. The cubic root of 47146861 is about 361.2581007351.

The spelling of 47146861 in words is "forty-seven million, one hundred forty-six thousand, eight hundred sixty-one".