2179447949 has 8 divisors (see below), whose sum is σ = 2491140288. Its totient is φ = 1867841280.

The previous prime is 2179447939. The next prime is 2179448003. The reversal of 2179447949 is 9497449712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2179447949 - 2⁸ = 2179447693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2179447894 and 2179447903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2179447939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48194 + ... + 81740.

It is an arithmetic number, because the mean of its divisors is an integer number (311392536).

Almost surely, 2^2179447949 is an apocalyptic number.

It is an amenable number.

2179447949 is a deficient number, since it is larger than the sum of its proper divisors (311692339).

2179447949 is an equidigital number, since it uses as much as digits as its factorization.

2179447949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42835.

The product of its digits is 4572288, while the sum is 56.

The square root of 2179447949 is about 46684.5579287199. The cubic root of 2179447949 is about 1296.5287965953.

The spelling of 2179447949 in words is "two billion, one hundred seventy-nine million, four hundred forty-seven thousand, nine hundred forty-nine".