1069936891 has 4 divisors (see below), whose sum is σ = 1071256984. Its totient is φ = 1068616800.

The previous prime is 1069936877. The next prime is 1069936909. The reversal of 1069936891 is 1986399601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1986399601 = 6317 ⋅314453.

It is a cyclic number.

It is not a de Polignac number, because 1069936891 - 2¹⁵ = 1069904123 is a prime.

It is a super-2 number, since 2×1069936891² = 2289529901445491762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1069936801) 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, 658830 + ... + 660451.

It is an arithmetic number, because the mean of its divisors is an integer number (267814246).

Almost surely, 2^1069936891 is an apocalyptic number.

1069936891 is a deficient number, since it is larger than the sum of its proper divisors (1320093).

1069936891 is an equidigital number, since it uses as much as digits as its factorization.

1069936891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320092.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 1069936891 is about 32709.8898041556. The cubic root of 1069936891 is about 1022.7890128195.

The spelling of 1069936891 in words is "one billion, sixty-nine million, nine hundred thirty-six thousand, eight hundred ninety-one".