9899487 has 24 divisors (see below), whose sum is σ = 15510768. Its totient is φ = 6048000.

The previous prime is 9899467. The next prime is 9899497. The reversal of 9899487 is 7849989.

It is a de Polignac number, because none of the positive numbers 2^k-9899487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899467) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24487 + ... + 24887.

It is an arithmetic number, because the mean of its divisors is an integer number (646282).

Almost surely, 2^9899487 is an apocalyptic number.

9899487 is a deficient number, since it is larger than the sum of its proper divisors (5611281).

9899487 is a wasteful number, since it uses less digits than its factorization.

9899487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 628 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 9899487 is about 3146.3450224030. The cubic root of 9899487 is about 214.7192079874.

The spelling of 9899487 in words is "nine million, eight hundred ninety-nine thousand, four hundred eighty-seven".