8643625 has 8 divisors (see below), whose sum is σ = 10787400. Its totient is φ = 6914800.

The previous prime is 8643619. The next prime is 8643631. The reversal of 8643625 is 5263468.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8643619) and next prime (8643631).

It can be written as a sum of positive squares in 4 ways, for example, as 685584 + 7958041 = 828^2 + 2821^2 .

It is not a de Polignac number, because 8643625 - 2¹³ = 8635433 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

8643625 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34450 + ... + 34699.

It is an arithmetic number, because the mean of its divisors is an integer number (1348425).

Almost surely, 2^8643625 is an apocalyptic number.

It is an amenable number.

8643625 is a deficient number, since it is larger than the sum of its proper divisors (2143775).

8643625 is an equidigital number, since it uses as much as digits as its factorization.

8643625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69164 (or 69154 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 8643625 is about 2940.0042516976. The cubic root of 8643625 is about 205.2258071017.

It can be divided in two parts, 86436 and 25, that multiplied together give a square (2160900 = 1470²).

The spelling of 8643625 in words is "eight million, six hundred forty-three thousand, six hundred twenty-five".