47640737 has 2 divisors, whose sum is σ = 47640738. Its totient is φ = 47640736.

The previous prime is 47640731. The next prime is 47640743. The reversal of 47640737 is 73704674.

47640737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (47640731) and next prime (47640743).

It can be written as a sum of positive squares in only one way, i.e., 40436881 + 7203856 = 6359^2 + 2684^2 .

It is a cyclic number.

It is not a de Polignac number, because 47640737 - 2⁶ = 47640673 is a prime.

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 47640737.

It is not a weakly prime, because it can be changed into another prime (47640731) 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, 23820368 + 23820369.

It is an arithmetic number, because the mean of its divisors is an integer number (23820369).

Almost surely, 2^47640737 is an apocalyptic number.

It is an amenable number.

47640737 is a deficient number, since it is larger than the sum of its proper divisors (1).

47640737 is an equidigital number, since it uses as much as digits as its factorization.

47640737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 38.

The square root of 47640737 is about 6902.2269594675. The cubic root of 47640737 is about 362.5151467313.

The spelling of 47640737 in words is "forty-seven million, six hundred forty thousand, seven hundred thirty-seven".