1099906091 has 4 divisors (see below), whose sum is σ = 1104626952. Its totient is φ = 1095185232.

The previous prime is 1099906081. The next prime is 1099906097. The reversal of 1099906091 is 1906099901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1906099901 = 33359 ⋅57139.

It is a cyclic number.

It is not a de Polignac number, because 1099906091 - 2²² = 1095711787 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (1099906097) 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, 2360081 + ... + 2360546.

It is an arithmetic number, because the mean of its divisors is an integer number (276156738).

Almost surely, 2^1099906091 is an apocalyptic number.

1099906091 is a deficient number, since it is larger than the sum of its proper divisors (4720861).

1099906091 is an equidigital number, since it uses as much as digits as its factorization.

1099906091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4720860.

The product of its (nonzero) digits is 39366, while the sum is 44.

The square root of 1099906091 is about 33164.8321418939. The cubic root of 1099906091 is about 1032.2507387436.

The spelling of 1099906091 in words is "one billion, ninety-nine million, nine hundred six thousand, ninety-one".