2191079494 has 4 divisors (see below), whose sum is σ = 3286619244. Its totient is φ = 1095539746.

The previous prime is 2191079489. The next prime is 2191079531. The reversal of 2191079494 is 4949701912.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547769872 + ... + 547769875.

It is an arithmetic number, because the mean of its divisors is an integer number (821654811).

Almost surely, 2^2191079494 is an apocalyptic number.

2191079494 is a deficient number, since it is larger than the sum of its proper divisors (1095539750).

2191079494 is a wasteful number, since it uses less digits than its factorization.

2191079494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095539749.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 2191079494 is about 46808.9680937318. The cubic root of 2191079494 is about 1298.8311968054.

The spelling of 2191079494 in words is "two billion, one hundred ninety-one million, seventy-nine thousand, four hundred ninety-four".