1055991169 has 4 divisors (see below), whose sum is σ = 1062984640. Its totient is φ = 1048997700.

The previous prime is 1055991163. The next prime is 1055991197. The reversal of 1055991169 is 9611995501.

1055991169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 9611995501 = 31 ⋅310064371.

It is a cyclic number.

It is not a de Polignac number, because 1055991169 - 2¹⁷ = 1055860097 is a prime.

It is a super-2 number, since 2×1055991169² = 2230234698011973122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055991163) 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, 3496509 + ... + 3496810.

It is an arithmetic number, because the mean of its divisors is an integer number (265746160).

Almost surely, 2^1055991169 is an apocalyptic number.

It is an amenable number.

1055991169 is a deficient number, since it is larger than the sum of its proper divisors (6993471).

1055991169 is an equidigital number, since it uses as much as digits as its factorization.

1055991169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6993470.

The product of its (nonzero) digits is 109350, while the sum is 46.

The square root of 1055991169 is about 32496.0177406402. The cubic root of 1055991169 is about 1018.3258352685.

The spelling of 1055991169 in words is "one billion, fifty-five million, nine hundred ninety-one thousand, one hundred sixty-nine".