1056209169 has 4 divisors (see below), whose sum is σ = 1408278896. Its totient is φ = 704139444.

The previous prime is 1056209131. The next prime is 1056209173. The reversal of 1056209169 is 9619026501.

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 de Polignac number, because none of the positive numbers 2^k-1056209169 is a prime.

It is a super-2 number, since 2×1056209169² = 2231155617359341122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1056209669) 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, 176034859 + ... + 176034864.

It is an arithmetic number, because the mean of its divisors is an integer number (352069724).

Almost surely, 2^1056209169 is an apocalyptic number.

It is an amenable number.

1056209169 is a deficient number, since it is larger than the sum of its proper divisors (352069727).

1056209169 is an equidigital number, since it uses as much as digits as its factorization.

1056209169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352069726.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 1056209169 is about 32499.3718246984. The cubic root of 1056209169 is about 1018.3959052224.

The spelling of 1056209169 in words is "one billion, fifty-six million, two hundred nine thousand, one hundred sixty-nine".