9947287 has 4 divisors (see below), whose sum is σ = 11368336. Its totient is φ = 8526240.

The previous prime is 9947281. The next prime is 9947291. The reversal of 9947287 is 7827499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7827499 = 337 ⋅23227.

It is a cyclic number.

It is not a de Polignac number, because 9947287 - 2¹¹ = 9945239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9947281) 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 in 3 ways as a sum of consecutive naturals, for example, 710514 + ... + 710527.

It is an arithmetic number, because the mean of its divisors is an integer number (2842084).

Almost surely, 2^9947287 is an apocalyptic number.

9947287 is a deficient number, since it is larger than the sum of its proper divisors (1421049).

9947287 is a wasteful number, since it uses less digits than its factorization.

9947287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421048.

The product of its digits is 254016, while the sum is 46.

The square root of 9947287 is about 3153.9319903891. The cubic root of 9947287 is about 215.0642461688.

It can be divided in two parts, 994 and 7287, that added together give a square (8281 = 91²).

The spelling of 9947287 in words is "nine million, nine hundred forty-seven thousand, two hundred eighty-seven".