8491623 has 16 divisors (see below), whose sum is σ = 13502976. Its totient is φ = 4641120.

The previous prime is 8491621. The next prime is 8491643. The reversal of 8491623 is 3261948.

It is not a de Polignac number, because 8491623 - 2¹ = 8491621 is a prime.

It is a super-2 number, since 2×8491623² = 144215322348258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8491621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8308 + ... + 9273.

It is an arithmetic number, because the mean of its divisors is an integer number (843936).

Almost surely, 2^8491623 is an apocalyptic number.

8491623 is a deficient number, since it is larger than the sum of its proper divisors (5011353).

8491623 is a wasteful number, since it uses less digits than its factorization.

8491623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17614.

The product of its digits is 10368, while the sum is 33.

The square root of 8491623 is about 2914.0389496367. The cubic root of 8491623 is about 204.0156898736.

The spelling of 8491623 in words is "eight million, four hundred ninety-one thousand, six hundred twenty-three".