8624991 has 8 divisors (see below), whose sum is σ = 11541760. Its totient is φ = 5729112.

The previous prime is 8624981. The next prime is 8624999. The reversal of 8624991 is 1994268.

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

It is a de Polignac number, because none of the positive numbers 2^k-8624991 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 (8624999) 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, 4231 + ... + 5928.

It is an arithmetic number, because the mean of its divisors is an integer number (1442720).

Almost surely, 2^8624991 is an apocalyptic number.

8624991 is a deficient number, since it is larger than the sum of its proper divisors (2916769).

8624991 is a wasteful number, since it uses less digits than its factorization.

8624991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10445.

The product of its digits is 31104, while the sum is 39.

The square root of 8624991 is about 2936.8334988555. The cubic root of 8624991 is about 205.0782251535.

The spelling of 8624991 in words is "eight million, six hundred twenty-four thousand, nine hundred ninety-one".