1050981209 has 4 divisors (see below), whose sum is σ = 1051102080. Its totient is φ = 1050860340.

The previous prime is 1050981163. The next prime is 1050981221. The reversal of 1050981209 is 9021890501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1050981209 is a prime.

It is a super-2 number, since 2×1050981209² = 2209123003342203362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1050981299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46289 + ... + 65150.

It is an arithmetic number, because the mean of its divisors is an integer number (262775520).

Almost surely, 2^1050981209 is an apocalyptic number.

It is an amenable number.

1050981209 is a deficient number, since it is larger than the sum of its proper divisors (120871).

1050981209 is an equidigital number, since it uses as much as digits as its factorization.

1050981209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120870.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 1050981209 is about 32418.8403401479. The cubic root of 1050981209 is about 1016.7128605485.

The spelling of 1050981209 in words is "one billion, fifty million, nine hundred eighty-one thousand, two hundred nine".