2175948947 has 4 divisors (see below), whose sum is σ = 2234758416. Its totient is φ = 2117139480.

The previous prime is 2175948937. The next prime is 2175948953. The reversal of 2175948947 is 7498495712.

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 2175948947 - 2³⁰ = 1102207123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2175948892 and 2175948901.

It is not an unprimeable number, because it can be changed into a prime (2175948917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29404679 + ... + 29404752.

It is an arithmetic number, because the mean of its divisors is an integer number (558689604).

Almost surely, 2^2175948947 is an apocalyptic number.

2175948947 is a deficient number, since it is larger than the sum of its proper divisors (58809469).

2175948947 is an equidigital number, since it uses as much as digits as its factorization.

2175948947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58809468.

The product of its digits is 5080320, while the sum is 56.

The square root of 2175948947 is about 46647.0679357235. The cubic root of 2175948947 is about 1295.8345861241.

The spelling of 2175948947 in words is "two billion, one hundred seventy-five million, nine hundred forty-eight thousand, nine hundred forty-seven".