47767661 has 2 divisors, whose sum is σ = 47767662. Its totient is φ = 47767660.

The previous prime is 47767633. The next prime is 47767667. The reversal of 47767661 is 16676774.

47767661 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., 34445161 + 13322500 = 5869^2 + 3650^2 .

It is a cyclic number.

It is not a de Polignac number, because 47767661 - 2⁶ = 47767597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47767667) 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, 23883830 + 23883831.

It is an arithmetic number, because the mean of its divisors is an integer number (23883831).

Almost surely, 2^47767661 is an apocalyptic number.

It is an amenable number.

47767661 is a deficient number, since it is larger than the sum of its proper divisors (1).

47767661 is an equidigital number, since it uses as much as digits as its factorization.

47767661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 44.

The square root of 47767661 is about 6911.4152675121. The cubic root of 47767661 is about 362.8367977265.

The spelling of 47767661 in words is "forty-seven million, seven hundred sixty-seven thousand, six hundred sixty-one".