47287657 has 2 divisors, whose sum is σ = 47287658. Its totient is φ = 47287656.

The previous prime is 47287651. The next prime is 47287697. The reversal of 47287657 is 75678274.

47287657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47279376 + 8281 = 6876^2 + 91^2 .

It is a cyclic number.

It is not a de Polignac number, because 47287657 - 2⁷ = 47287529 is a prime.

It is a super-2 number, since 2×47287657² = 4472245009099298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47287651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23643828 + 23643829.

It is an arithmetic number, because the mean of its divisors is an integer number (23643829).

Almost surely, 2^47287657 is an apocalyptic number.

It is an amenable number.

47287657 is a deficient number, since it is larger than the sum of its proper divisors (1).

47287657 is an equidigital number, since it uses as much as digits as its factorization.

47287657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 658560, while the sum is 46.

The square root of 47287657 is about 6876.6021405924. The cubic root of 47287657 is about 361.6173551047.

The spelling of 47287657 in words is "forty-seven million, two hundred eighty-seven thousand, six hundred fifty-seven".