1099664 has 10 divisors (see below), whose sum is σ = 2130630. Its totient is φ = 549824.

The previous prime is 1099649. The next prime is 1099669. The reversal of 1099664 is 4669901.

1099664 = T₂₄₆ + T₂₄₇ + ... + T₂₇₇.

It can be written as a sum of positive squares in only one way, i.e., 984064 + 115600 = 992^2 + 340^2 .

It is not an unprimeable number, because it can be changed into a prime (1099669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34349 + ... + 34380.

It is an arithmetic number, because the mean of its divisors is an integer number (213063).

2^1099664 is an apocalyptic number.

It is an amenable number.

1099664 is a deficient number, since it is larger than the sum of its proper divisors (1030966).

1099664 is an equidigital number, since it uses as much as digits as its factorization.

1099664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68737 (or 68731 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 1099664 is about 1048.6486542212. The cubic root of 1099664 is about 103.2174999868.

The spelling of 1099664 in words is "one million, ninety-nine thousand, six hundred sixty-four".