47887717 has 2 divisors, whose sum is σ = 47887718. Its totient is φ = 47887716.

The previous prime is 47887709. The next prime is 47887757. The reversal of 47887717 is 71778874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34093921 + 13793796 = 5839^2 + 3714^2 .

It is a cyclic number.

It is not a de Polignac number, because 47887717 - 2³ = 47887709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47887757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23943858 + 23943859.

It is an arithmetic number, because the mean of its divisors is an integer number (23943859).

Almost surely, 2^47887717 is an apocalyptic number.

It is an amenable number.

47887717 is a deficient number, since it is larger than the sum of its proper divisors (1).

47887717 is an equidigital number, since it uses as much as digits as its factorization.

47887717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 614656, while the sum is 49.

The square root of 47887717 is about 6920.0951583053. The cubic root of 47887717 is about 363.1405198846.

The spelling of 47887717 in words is "forty-seven million, eight hundred eighty-seven thousand, seven hundred seventeen".