12069891 has 10 divisors (see below), whose sum is σ = 18030452. Its totient is φ = 8046540.

The previous prime is 12069877. The next prime is 12069899. The reversal of 12069891 is 19896021.

It is not a de Polignac number, because 12069891 - 2⁷ = 12069763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12069899) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 74425 + ... + 74586.

Almost surely, 2^12069891 is an apocalyptic number.

12069891 is a deficient number, since it is larger than the sum of its proper divisors (5960561).

12069891 is an equidigital number, since it uses as much as digits as its factorization.

12069891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149023 (or 149014 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 12069891 is about 3474.1748660653. The cubic root of 12069891 is about 229.3864618456.

The spelling of 12069891 in words is "twelve million, sixty-nine thousand, eight hundred ninety-one".