9649891 has 6 divisors (see below), whose sum is σ = 10184892. Its totient is φ = 9141660.

The previous prime is 9649877. The next prime is 9649901. The reversal of 9649891 is 1989469.

It is not a de Polignac number, because 9649891 - 2⁹ = 9649379 is a prime.

It is a Duffinian number.

9649891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9644891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13005 + ... + 13726.

It is an arithmetic number, because the mean of its divisors is an integer number (1697482).

Almost surely, 2^9649891 is an apocalyptic number.

9649891 is a deficient number, since it is larger than the sum of its proper divisors (535001).

9649891 is a wasteful number, since it uses less digits than its factorization.

9649891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26769 (or 26750 counting only the distinct ones).

The product of its digits is 139968, while the sum is 46.

The square root of 9649891 is about 3106.4273691815. The cubic root of 9649891 is about 212.8992521699.

The spelling of 9649891 in words is "nine million, six hundred forty-nine thousand, eight hundred ninety-one".