10643609 has 4 divisors (see below), whose sum is σ = 11010660. Its totient is φ = 10276560.

The previous prime is 10643593. The next prime is 10643617. The reversal of 10643609 is 90634601.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7546009 + 3097600 = 2747^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 10643609 - 2⁴ = 10643593 is a prime.

It is a super-2 number, since 2×10643609² = 226572825089762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 367021 = 10643609 / (1 + 0 + 6 + 4 + 3 + 6 + 0 + 9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10643639) 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, 183482 + ... + 183539.

It is an arithmetic number, because the mean of its divisors is an integer number (2752665).

Almost surely, 2^10643609 is an apocalyptic number.

It is an amenable number.

10643609 is a deficient number, since it is larger than the sum of its proper divisors (367051).

10643609 is an equidigital number, since it uses as much as digits as its factorization.

10643609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367050.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 10643609 is about 3262.4544441264. The cubic root of 10643609 is about 219.9697547953.

The spelling of 10643609 in words is "ten million, six hundred forty-three thousand, six hundred nine".