1099850909 has 2 divisors, whose sum is σ = 1099850910. Its totient is φ = 1099850908.

The previous prime is 1099850881. The next prime is 1099850957. The reversal of 1099850909 is 9090589901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999950884 + 99900025 = 31622^2 + 9995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1099850909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1099850959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549925454 + 549925455.

It is an arithmetic number, because the mean of its divisors is an integer number (549925455).

Almost surely, 2^1099850909 is an apocalyptic number.

It is an amenable number.

1099850909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099850909 is an equidigital number, since it uses as much as digits as its factorization.

1099850909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 50.

The square root of 1099850909 is about 33164.0001959957. Note that the first 3 decimals coincide. The cubic root of 1099850909 is about 1032.2334758720.

The spelling of 1099850909 in words is "one billion, ninety-nine million, eight hundred fifty thousand, nine hundred nine".