9902691 has 12 divisors (see below), whose sum is σ = 14385280. Its totient is φ = 6564240.

The previous prime is 9902681. The next prime is 9902699. The reversal of 9902691 is 1962099.

9902691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9902691 - 2¹¹ = 9900643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9902699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1411 + ... + 4668.

Almost surely, 2^9902691 is an apocalyptic number.

9902691 is a deficient number, since it is larger than the sum of its proper divisors (4482589).

9902691 is a wasteful number, since it uses less digits than its factorization.

9902691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6266 (or 6263 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 9902691 is about 3146.8541434264. The cubic root of 9902691 is about 214.7423703370.

The spelling of 9902691 in words is "nine million, nine hundred two thousand, six hundred ninety-one".