47930917 has 2 divisors, whose sum is σ = 47930918. Its totient is φ = 47930916.

The previous prime is 47930899. The next prime is 47930963. The reversal of 47930917 is 71903974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28579716 + 19351201 = 5346^2 + 4399^2 .

It is a cyclic number.

It is not a de Polignac number, because 47930917 - 2⁷ = 47930789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47930917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47930017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23965458 + 23965459.

It is an arithmetic number, because the mean of its divisors is an integer number (23965459).

Almost surely, 2^47930917 is an apocalyptic number.

It is an amenable number.

47930917 is a deficient number, since it is larger than the sum of its proper divisors (1).

47930917 is an equidigital number, since it uses as much as digits as its factorization.

47930917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 47930917 is about 6923.2157990344. The cubic root of 47930917 is about 363.2496846591.

The spelling of 47930917 in words is "forty-seven million, nine hundred thirty thousand, nine hundred seventeen".