1099387 has 4 divisors (see below), whose sum is σ = 1102360. Its totient is φ = 1096416.

The previous prime is 1099369. The next prime is 1099391. The reversal of 1099387 is 7839901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7839901 = 1667 ⋅4703.

It is a cyclic number.

It is not a de Polignac number, because 1099387 - 2¹⁵ = 1066619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1099327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837 + ... + 1702.

It is an arithmetic number, because the mean of its divisors is an integer number (275590).

2^1099387 is an apocalyptic number.

1099387 is a deficient number, since it is larger than the sum of its proper divisors (2973).

1099387 is an equidigital number, since it uses as much as digits as its factorization.

1099387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1099387 is about 1048.5165711614. The cubic root of 1099387 is about 103.2088325974.

The spelling of 1099387 in words is "one million, ninety-nine thousand, three hundred eighty-seven".