1069825209 has 4 divisors (see below), whose sum is σ = 1426433616. Its totient is φ = 713216804.

The previous prime is 1069825199. The next prime is 1069825217. The reversal of 1069825209 is 9025289601.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9025289601 = 3 ⋅3008429867.

It is a cyclic number.

It is not a de Polignac number, because 1069825209 - 2²⁰ = 1068776633 is a prime.

It is a super-2 number, since 2×1069825209² = 2289051955623787362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1069825219) 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, 178304199 + ... + 178304204.

It is an arithmetic number, because the mean of its divisors is an integer number (356608404).

Almost surely, 2^1069825209 is an apocalyptic number.

It is an amenable number.

1069825209 is a deficient number, since it is larger than the sum of its proper divisors (356608407).

1069825209 is an equidigital number, since it uses as much as digits as its factorization.

1069825209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356608406.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 1069825209 is about 32708.1826000773. The cubic root of 1069825209 is about 1022.7534247090.

The spelling of 1069825209 in words is "one billion, sixty-nine million, eight hundred twenty-five thousand, two hundred nine".