8913891 has 8 divisors (see below), whose sum is σ = 13583104. Its totient is φ = 5093640.

The previous prime is 8913889. The next prime is 8913893. The reversal of 8913891 is 1983198.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8913889) and next prime (8913893).

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

It is not a de Polignac number, because 8913891 - 2¹ = 8913889 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8913893) 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, 212215 + ... + 212256.

It is an arithmetic number, because the mean of its divisors is an integer number (1697888).

Almost surely, 2^8913891 is an apocalyptic number.

8913891 is a deficient number, since it is larger than the sum of its proper divisors (4669213).

8913891 is a wasteful number, since it uses less digits than its factorization.

8913891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424481.

The product of its digits is 15552, while the sum is 39.

The square root of 8913891 is about 2985.6140072019. The cubic root of 8913891 is about 207.3428703500.

The spelling of 8913891 in words is "eight million, nine hundred thirteen thousand, eight hundred ninety-one".