8916621 has 8 divisors (see below), whose sum is σ = 13587264. Its totient is φ = 5095200.

The previous prime is 8916599. The next prime is 8916629. The reversal of 8916621 is 1266198.

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

It is not a de Polignac number, because 8916621 - 2¹⁰ = 8915597 is a prime.

It is a super-2 number, since 2×8916621² = 159012260115282, which contains 22 as substring.

8916621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8916629) 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, 212280 + ... + 212321.

It is an arithmetic number, because the mean of its divisors is an integer number (1698408).

Almost surely, 2^8916621 is an apocalyptic number.

It is an amenable number.

8916621 is a deficient number, since it is larger than the sum of its proper divisors (4670643).

8916621 is a wasteful number, since it uses less digits than its factorization.

8916621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424611.

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

The square root of 8916621 is about 2986.0711645907. The cubic root of 8916621 is about 207.3640353781.

The spelling of 8916621 in words is "eight million, nine hundred sixteen thousand, six hundred twenty-one".