47257117 has 2 divisors, whose sum is σ = 47257118. Its totient is φ = 47257116.

The previous prime is 47257099. The next prime is 47257151. The reversal of 47257117 is 71175274.

It is an a-pointer prime, because the next prime (47257151) can be obtained adding 47257117 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26563716 + 20693401 = 5154^2 + 4549^2 .

It is a cyclic number.

It is not a de Polignac number, because 47257117 - 2¹⁵ = 47224349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47257517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23628558 + 23628559.

It is an arithmetic number, because the mean of its divisors is an integer number (23628559).

Almost surely, 2^47257117 is an apocalyptic number.

It is an amenable number.

47257117 is a deficient number, since it is larger than the sum of its proper divisors (1).

47257117 is an equidigital number, since it uses as much as digits as its factorization.

47257117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13720, while the sum is 34.

The square root of 47257117 is about 6874.3812085162. The cubic root of 47257117 is about 361.5394900192.

It can be divided in two parts, 47257 and 117, that added together give a palindrome (47374).

The spelling of 47257117 in words is "forty-seven million, two hundred fifty-seven thousand, one hundred seventeen".