47661643 has 2 divisors, whose sum is σ = 47661644. Its totient is φ = 47661642.

The previous prime is 47661631. The next prime is 47661701. The reversal of 47661643 is 34616674.

47661643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47661643 is a prime.

It is not a weakly prime, because it can be changed into another prime (47661613) 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, 23830821 + 23830822.

It is an arithmetic number, because the mean of its divisors is an integer number (23830822).

Almost surely, 2^47661643 is an apocalyptic number.

47661643 is a deficient number, since it is larger than the sum of its proper divisors (1).

47661643 is an equidigital number, since it uses as much as digits as its factorization.

47661643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 47661643 is about 6903.7412321147. The cubic root of 47661643 is about 362.5681660157.

The spelling of 47661643 in words is "forty-seven million, six hundred sixty-one thousand, six hundred forty-three".