47755661 has 2 divisors, whose sum is σ = 47755662. Its totient is φ = 47755660.

The previous prime is 47755649. The next prime is 47755667. The reversal of 47755661 is 16655774.

47755661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29214025 + 18541636 = 5405^2 + 4306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47755661 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47755667) 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, 23877830 + 23877831.

It is an arithmetic number, because the mean of its divisors is an integer number (23877831).

Almost surely, 2^47755661 is an apocalyptic number.

It is an amenable number.

47755661 is a deficient number, since it is larger than the sum of its proper divisors (1).

47755661 is an equidigital number, since it uses as much as digits as its factorization.

47755661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 41.

The square root of 47755661 is about 6910.5470839869. The cubic root of 47755661 is about 362.8064117140.

The spelling of 47755661 in words is "forty-seven million, seven hundred fifty-five thousand, six hundred sixty-one".