9902489 has 4 divisors (see below), whose sum is σ = 10333056. Its totient is φ = 9471924.

The previous prime is 9902471. The next prime is 9902491. The reversal of 9902489 is 9842099.

9902489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9902489 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9902419) 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, 215249 + ... + 215294.

It is an arithmetic number, because the mean of its divisors is an integer number (2583264).

Almost surely, 2^9902489 is an apocalyptic number.

It is an amenable number.

9902489 is a deficient number, since it is larger than the sum of its proper divisors (430567).

9902489 is a wasteful number, since it uses less digits than its factorization.

9902489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430566.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 9902489 is about 3146.8220477173. The cubic root of 9902489 is about 214.7409101867.

The spelling of 9902489 in words is "nine million, nine hundred two thousand, four hundred eighty-nine".