47387117 has 2 divisors, whose sum is σ = 47387118. Its totient is φ = 47387116.

The previous prime is 47387113. The next prime is 47387167. The reversal of 47387117 is 71178374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32787076 + 14600041 = 5726^2 + 3821^2 .

It is a cyclic number.

It is not a de Polignac number, because 47387117 - 2² = 47387113 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47387113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23693558 + 23693559.

It is an arithmetic number, because the mean of its divisors is an integer number (23693559).

Almost surely, 2^47387117 is an apocalyptic number.

It is an amenable number.

47387117 is a deficient number, since it is larger than the sum of its proper divisors (1).

47387117 is an equidigital number, since it uses as much as digits as its factorization.

47387117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32928, while the sum is 38.

The square root of 47387117 is about 6883.8301112099. The cubic root of 47387117 is about 361.8707071617.

The spelling of 47387117 in words is "forty-seven million, three hundred eighty-seven thousand, one hundred seventeen".