8621691 has 8 divisors (see below), whose sum is σ = 12379920. Its totient is φ = 5305632.

The previous prime is 8621681. The next prime is 8621693. The reversal of 8621691 is 1961268.

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

It is not a de Polignac number, because 8621691 - 2¹⁴ = 8605307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8621693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110496 + ... + 110573.

It is an arithmetic number, because the mean of its divisors is an integer number (1547490).

Almost surely, 2^8621691 is an apocalyptic number.

8621691 is a deficient number, since it is larger than the sum of its proper divisors (3758229).

8621691 is a wasteful number, since it uses less digits than its factorization.

8621691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221085.

The product of its digits is 5184, while the sum is 33.

The square root of 8621691 is about 2936.2716155015. The cubic root of 8621691 is about 205.0520668857.

The spelling of 8621691 in words is "eight million, six hundred twenty-one thousand, six hundred ninety-one".