47640643 has 4 divisors (see below), whose sum is σ = 47662560. Its totient is φ = 47618728.

The previous prime is 47640641. The next prime is 47640653. The reversal of 47640643 is 34604674.

47640643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47640643 - 2¹ = 47640641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47640599 and 47640608.

It is not an unprimeable number, because it can be changed into a prime (47640641) 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 in 3 ways as a sum of consecutive naturals, for example, 7288 + ... + 12181.

It is an arithmetic number, because the mean of its divisors is an integer number (11915640).

Almost surely, 2^47640643 is an apocalyptic number.

47640643 is a deficient number, since it is larger than the sum of its proper divisors (21917).

47640643 is a wasteful number, since it uses less digits than its factorization.

47640643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21916.

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 47640643 is about 6902.2201500677. The cubic root of 47640643 is about 362.5149083048.

The spelling of 47640643 in words is "forty-seven million, six hundred forty thousand, six hundred forty-three".