8161623 has 6 divisors (see below), whose sum is σ = 11789024. Its totient is φ = 5441076.

The previous prime is 8161607. The next prime is 8161627. The reversal of 8161623 is 3261618.

8161623 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8161623 - 2⁴ = 8161607 is a prime.

It is a super-2 number, since 2×8161623² = 133224179988258, which contains 22 as substring.

It is a Duffinian number.

8161623 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161627) 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 5 ways as a sum of consecutive naturals, for example, 453415 + ... + 453432.

Almost surely, 2^8161623 is an apocalyptic number.

8161623 is a deficient number, since it is larger than the sum of its proper divisors (3627401).

8161623 is a wasteful number, since it uses less digits than its factorization.

8161623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906853 (or 906850 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 8161623 is about 2856.8554391148. The cubic root of 8161623 is about 201.3378886469.

The spelling of 8161623 in words is "eight million, one hundred sixty-one thousand, six hundred twenty-three".