9049891 has 8 divisors (see below), whose sum is σ = 9236304. Its totient is φ = 8865120.

The previous prime is 9049877. The next prime is 9049913. The reversal of 9049891 is 1989409.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9049891 - 2¹⁹ = 8525603 is a prime.

It is a super-2 number, since 2×9049891² = 163801054223762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9049801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19401 + ... + 19861.

It is an arithmetic number, because the mean of its divisors is an integer number (1154538).

Almost surely, 2^9049891 is an apocalyptic number.

9049891 is a deficient number, since it is larger than the sum of its proper divisors (186413).

9049891 is a wasteful number, since it uses less digits than its factorization.

9049891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 9049891 is about 3008.3036748307. The cubic root of 9049891 is about 208.3920352270.

The spelling of 9049891 in words is "nine million, forty-nine thousand, eight hundred ninety-one".