2191064027 has 4 divisors (see below), whose sum is σ = 2192476440. Its totient is φ = 2189651616.

The previous prime is 2191064017. The next prime is 2191064053. The reversal of 2191064027 is 7204601912.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2191064027 - 2²⁴ = 2174286811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2191063984 and 2191064002.

It is not an unprimeable number, because it can be changed into a prime (2191064017) 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, 703877 + ... + 706982.

It is an arithmetic number, because the mean of its divisors is an integer number (548119110).

Almost surely, 2^2191064027 is an apocalyptic number.

2191064027 is a deficient number, since it is larger than the sum of its proper divisors (1412413).

2191064027 is a wasteful number, since it uses less digits than its factorization.

2191064027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412412.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 2191064027 is about 46808.8028793730. The cubic root of 2191064027 is about 1298.8281406148.

Adding to 2191064027 its reverse (7204601912), we get a palindrome (9395665939).

The spelling of 2191064027 in words is "two billion, one hundred ninety-one million, sixty-four thousand, twenty-seven".