47791717 has 2 divisors, whose sum is σ = 47791718. Its totient is φ = 47791716.

The previous prime is 47791693. The next prime is 47791721. The reversal of 47791717 is 71719774.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47348161 + 443556 = 6881^2 + 666^2 .

It is a cyclic number.

It is not a de Polignac number, because 47791717 - 2⁷ = 47791589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47791727) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23895858 + 23895859.

It is an arithmetic number, because the mean of its divisors is an integer number (23895859).

Almost surely, 2^47791717 is an apocalyptic number.

It is an amenable number.

47791717 is a deficient number, since it is larger than the sum of its proper divisors (1).

47791717 is an equidigital number, since it uses as much as digits as its factorization.

47791717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86436, while the sum is 43.

The square root of 47791717 is about 6913.1553577220. The cubic root of 47791717 is about 362.8976962298.

The spelling of 47791717 in words is "forty-seven million, seven hundred ninety-one thousand, seven hundred seventeen".