47427257 has 2 divisors, whose sum is σ = 47427258. Its totient is φ = 47427256.

The previous prime is 47427251. The next prime is 47427271. The reversal of 47427257 is 75272474.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27678121 + 19749136 = 5261^2 + 4444^2 .

It is a cyclic number.

It is not a de Polignac number, because 47427257 - 2²⁰ = 46378681 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47427257.

It is not a weakly prime, because it can be changed into another prime (47427251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23713628 + 23713629.

It is an arithmetic number, because the mean of its divisors is an integer number (23713629).

Almost surely, 2^47427257 is an apocalyptic number.

It is an amenable number.

47427257 is a deficient number, since it is larger than the sum of its proper divisors (1).

47427257 is an equidigital number, since it uses as much as digits as its factorization.

47427257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109760, while the sum is 38.

The square root of 47427257 is about 6886.7450221422. The cubic root of 47427257 is about 361.9728544096.

The spelling of 47427257 in words is "forty-seven million, four hundred twenty-seven thousand, two hundred fifty-seven".