2478889993 has 2 divisors, whose sum is σ = 2478889994. Its totient is φ = 2478889992.

The previous prime is 2478889957. The next prime is 2478890017. The reversal of 2478889993 is 3999888742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2123642889 + 355247104 = 46083^2 + 18848^2 .

It is a cyclic number.

It is not a de Polignac number, because 2478889993 - 2²⁵ = 2445335561 is a prime.

It is a super-2 number, since 2×2478889993² = 12289791194791080098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2478889393) 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 as a sum of consecutive naturals, namely, 1239444996 + 1239444997.

It is an arithmetic number, because the mean of its divisors is an integer number (1239444997).

Almost surely, 2^2478889993 is an apocalyptic number.

It is an amenable number.

2478889993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478889993 is an equidigital number, since it uses as much as digits as its factorization.

2478889993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62705664, while the sum is 67.

The square root of 2478889993 is about 49788.4524061554. The cubic root of 2478889993 is about 1353.3779136242.

The spelling of 2478889993 in words is "two billion, four hundred seventy-eight million, eight hundred eighty-nine thousand, nine hundred ninety-three".