2175947794 has 4 divisors (see below), whose sum is σ = 3263921694. Its totient is φ = 1087973896.

The previous prime is 2175947783. The next prime is 2175947801. The reversal of 2175947794 is 4977495712.

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

It can be written as a sum of positive squares in only one way, i.e., 2101764025 + 74183769 = 45845^2 + 8613^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543986947 + ... + 543986950.

Almost surely, 2^2175947794 is an apocalyptic number.

2175947794 is a deficient number, since it is larger than the sum of its proper divisors (1087973900).

2175947794 is a wasteful number, since it uses less digits than its factorization.

2175947794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087973899.

The product of its digits is 4445280, while the sum is 55.

The square root of 2175947794 is about 46647.0555769601. The cubic root of 2175947794 is about 1295.8343572435.

It can be divided in two parts, 2175947 and 794, that added together give a triangular number (2176741 = T₂₀₈₆).

The spelling of 2175947794 in words is "two billion, one hundred seventy-five million, nine hundred forty-seven thousand, seven hundred ninety-four".