9976287 has 4 divisors (see below), whose sum is σ = 13301720. Its totient is φ = 6650856.

The previous prime is 9976279. The next prime is 9976289. The reversal of 9976287 is 7826799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7826799 = 3 ⋅2608933.

It is not a de Polignac number, because 9976287 - 2³ = 9976279 is a prime.

It is a Duffinian number.

9976287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9976289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662712 + ... + 1662717.

It is an arithmetic number, because the mean of its divisors is an integer number (3325430).

Almost surely, 2^9976287 is an apocalyptic number.

9976287 is a deficient number, since it is larger than the sum of its proper divisors (3325433).

9976287 is a wasteful number, since it uses less digits than its factorization.

9976287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325432.

The product of its digits is 381024, while the sum is 48.

The square root of 9976287 is about 3158.5260803102. The cubic root of 9976287 is about 215.2730405204.

The spelling of 9976287 in words is "nine million, nine hundred seventy-six thousand, two hundred eighty-seven".