8723643 has 4 divisors (see below), whose sum is σ = 11631528. Its totient is φ = 5815760.

The previous prime is 8723639. The next prime is 8723653. The reversal of 8723643 is 3463278.

8723643 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8723643 - 2² = 8723639 is a prime.

It is a super-2 number, since 2×8723643² = 152203894382898, which contains 22 as substring.

It is a d-powerful number, because it can be written as 8⁵ + 7⁴ + 2²³ + 3⁵ + 6⁷ + 4 + 3⁹ .

8723643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8723653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453938 + ... + 1453943.

It is an arithmetic number, because the mean of its divisors is an integer number (2907882).

Almost surely, 2^8723643 is an apocalyptic number.

8723643 is a deficient number, since it is larger than the sum of its proper divisors (2907885).

8723643 is a wasteful number, since it uses less digits than its factorization.

8723643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907884.

The product of its digits is 24192, while the sum is 33.

The square root of 8723643 is about 2953.5813853693. The cubic root of 8723643 is about 205.8571526723.

The spelling of 8723643 in words is "eight million, seven hundred twenty-three thousand, six hundred forty-three".