8725643 has 2 divisors, whose sum is σ = 8725644. Its totient is φ = 8725642.

The previous prime is 8725631. The next prime is 8725657. The reversal of 8725643 is 3465278.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8725643 - 2⁴ = 8725627 is a prime.

It is a super-2 number, since 2×8725643² = 152273691526898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8725243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4362821 + 4362822.

It is an arithmetic number, because the mean of its divisors is an integer number (4362822).

Almost surely, 2^8725643 is an apocalyptic number.

8725643 is a deficient number, since it is larger than the sum of its proper divisors (1).

8725643 is an equidigital number, since it uses as much as digits as its factorization.

8725643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 35.

The square root of 8725643 is about 2953.9199379807. The cubic root of 8725643 is about 205.8728832123.

The spelling of 8725643 in words is "eight million, seven hundred twenty-five thousand, six hundred forty-three".