47918617 has 2 divisors, whose sum is σ = 47918618. Its totient is φ = 47918616.

The previous prime is 47918609. The next prime is 47918623. The reversal of 47918617 is 71681974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36433296 + 11485321 = 6036^2 + 3389^2 .

It is a cyclic number.

It is not a de Polignac number, because 47918617 - 2³ = 47918609 is a prime.

It is a super-3 number, since 3×47918617³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (47918317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23959308 + 23959309.

It is an arithmetic number, because the mean of its divisors is an integer number (23959309).

Almost surely, 2^47918617 is an apocalyptic number.

It is an amenable number.

47918617 is a deficient number, since it is larger than the sum of its proper divisors (1).

47918617 is an equidigital number, since it uses as much as digits as its factorization.

47918617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 43.

The square root of 47918617 is about 6922.3274265235. The cubic root of 47918617 is about 363.2186097034.

The spelling of 47918617 in words is "forty-seven million, nine hundred eighteen thousand, six hundred seventeen".