191027412 has 18 divisors (see below), whose sum is σ = 482874938. Its totient is φ = 63675792.

The previous prime is 191027401. The next prime is 191027413. The reversal of 191027412 is 214720191.

191027412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 105760656 + 85266756 = 10284^2 + 9234^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191027413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2653123 + ... + 2653194.

Almost surely, 2^191027412 is an apocalyptic number.

191027412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191027412 is an abundant number, since it is smaller than the sum of its proper divisors (291847526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191027412 is a wasteful number, since it uses less digits than its factorization.

191027412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306327 (or 5306322 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 191027412 is about 13821.2666568589. The cubic root of 191027412 is about 575.9240712993.

The spelling of 191027412 in words is "one hundred ninety-one million, twenty-seven thousand, four hundred twelve".