1099445387 has 4 divisors (see below), whose sum is σ = 1105587720. Its totient is φ = 1093303056.

The previous prime is 1099445383. The next prime is 1099445401. The reversal of 1099445387 is 7835449901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1099445387 - 2² = 1099445383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1099445383) 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, 3070898 + ... + 3071255.

It is an arithmetic number, because the mean of its divisors is an integer number (276396930).

Almost surely, 2^1099445387 is an apocalyptic number.

1099445387 is a deficient number, since it is larger than the sum of its proper divisors (6142333).

1099445387 is an equidigital number, since it uses as much as digits as its factorization.

1099445387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6142332.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 1099445387 is about 33157.8857438167. The cubic root of 1099445387 is about 1032.1065966023.

The spelling of 1099445387 in words is "one billion, ninety-nine million, four hundred forty-five thousand, three hundred eighty-seven".