10206649 has 4 divisors (see below), whose sum is σ = 10275300. Its totient is φ = 10138000.

The previous prime is 10206611. The next prime is 10206659. The reversal of 10206649 is 94660201.

10206649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 640000 + 9566649 = 800^2 + 3093^2 .

It is a cyclic number.

It is not a de Polignac number, because 10206649 - 2¹³ = 10198457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10206659) 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, 34102 + ... + 34399.

It is an arithmetic number, because the mean of its divisors is an integer number (2568825).

Almost surely, 2^10206649 is an apocalyptic number.

It is an amenable number.

10206649 is a deficient number, since it is larger than the sum of its proper divisors (68651).

10206649 is an equidigital number, since it uses as much as digits as its factorization.

10206649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68650.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 10206649 is about 3194.7846562797. The cubic root of 10206649 is about 216.9174015100.

The spelling of 10206649 in words is "ten million, two hundred six thousand, six hundred forty-nine".