2478229729 has 2 divisors, whose sum is σ = 2478229730. Its totient is φ = 2478229728.

The previous prime is 2478229711. The next prime is 2478229799. The reversal of 2478229729 is 9279228742.

It is a happy number.

2478229729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1595842704 + 882387025 = 39948^2 + 29705^2 .

It is a cyclic number.

It is not a de Polignac number, because 2478229729 - 2⁹ = 2478229217 is a prime.

It is a super-2 number, since 2×2478229729² = 12283245179398826882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2478229799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239114864 + 1239114865.

It is an arithmetic number, because the mean of its divisors is an integer number (1239114865).

Almost surely, 2^2478229729 is an apocalyptic number.

It is an amenable number.

2478229729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478229729 is an equidigital number, since it uses as much as digits as its factorization.

2478229729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The square root of 2478229729 is about 49781.8212704196. The cubic root of 2478229729 is about 1353.2577434316.

The spelling of 2478229729 in words is "two billion, four hundred seventy-eight million, two hundred twenty-nine thousand, seven hundred twenty-nine".