2478933209 has 2 divisors, whose sum is σ = 2478933210. Its totient is φ = 2478933208.

The previous prime is 2478933199. The next prime is 2478933221. The reversal of 2478933209 is 9023398742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2404921600 + 74011609 = 49040^2 + 8603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2478933209 is a prime.

It is a super-2 number, since 2×2478933209² = 12290219709366075362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2478933229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239466604 + 1239466605.

It is an arithmetic number, because the mean of its divisors is an integer number (1239466605).

Almost surely, 2^2478933209 is an apocalyptic number.

It is an amenable number.

2478933209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478933209 is an equidigital number, since it uses as much as digits as its factorization.

2478933209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 2478933209 is about 49788.8864004810. The cubic root of 2478933209 is about 1353.3857783325.

The spelling of 2478933209 in words is "two billion, four hundred seventy-eight million, nine hundred thirty-three thousand, two hundred nine".