10999649 has 4 divisors (see below), whose sum is σ = 11056836. Its totient is φ = 10942464.

The previous prime is 10999643. The next prime is 10999657. The reversal of 10999649 is 94699901.

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 5914624 + 5085025 = 2432^2 + 2255^2 .

It is a cyclic number.

It is not a de Polignac number, because 10999649 - 2¹⁶ = 10934113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10999643) 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, 28304 + ... + 28689.

It is an arithmetic number, because the mean of its divisors is an integer number (2764209).

Almost surely, 2^10999649 is an apocalyptic number.

It is an amenable number.

10999649 is a deficient number, since it is larger than the sum of its proper divisors (57187).

10999649 is an equidigital number, since it uses as much as digits as its factorization.

10999649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57186.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 10999649 is about 3316.5718746923. The cubic root of 10999649 is about 222.3956435257.

The spelling of 10999649 in words is "ten million, nine hundred ninety-nine thousand, six hundred forty-nine".