1011049209 has 15 divisors (see below), whose sum is σ = 1510760383. Its totient is φ = 673842024.

The previous prime is 1011049183. The next prime is 1011049213. The reversal of 1011049209 is 9029401101.

The square root of 1011049209 is 31797.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 826850025 + 184199184 = 28755^2 + 13572^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1011049209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011049009) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 284407 + ... + 287939.

Almost surely, 2^1011049209 is an apocalyptic number.

1011049209 is the 31797-th square number.

1011049209 is the 15899-th centered octagonal number.

It is an amenable number.

1011049209 is a deficient number, since it is larger than the sum of its proper divisors (499711174).

1011049209 is an frugal number, since it uses more digits than its factorization.

1011049209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7078 (or 3536 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The cubic root of 1011049209 is about 1003.6695873241.

It can be divided in two parts, 10110 and 49209, that added together give a cube (59319 = 39³).

The spelling of 1011049209 in words is "one billion, eleven million, forty-nine thousand, two hundred nine".