1099669 has 2 divisors, whose sum is σ = 1099670. Its totient is φ = 1099668.

The previous prime is 1099649. The next prime is 1099687. The reversal of 1099669 is 9669901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 555025 + 544644 = 745^2 + 738^2 .

It is an emirp because it is prime and its reverse (9669901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1099669 - 2⁷ = 1099541 is a prime.

It is a super-2 number, since 2×1099669² = 2418543819122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1099619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549834 + 549835.

It is an arithmetic number, because the mean of its divisors is an integer number (549835).

2^1099669 is an apocalyptic number.

It is an amenable number.

1099669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099669 is an equidigital number, since it uses as much as digits as its factorization.

1099669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 1099669 is about 1048.6510382391. The cubic root of 1099669 is about 103.2176564245.

The spelling of 1099669 in words is "one million, ninety-nine thousand, six hundred sixty-nine".