2478992987 has 2 divisors, whose sum is σ = 2478992988. Its totient is φ = 2478992986.

The previous prime is 2478992977. The next prime is 2478993031. The reversal of 2478992987 is 7892998742.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2478992987 is a prime.

It is a super-2 number, since 2×2478992987² = 12290812459190364338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2478992977) 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 as a sum of consecutive naturals, namely, 1239496493 + 1239496494.

It is an arithmetic number, because the mean of its divisors is an integer number (1239496494).

Almost surely, 2^2478992987 is an apocalyptic number.

2478992987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478992987 is an equidigital number, since it uses as much as digits as its factorization.

2478992987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 65.

The square root of 2478992987 is about 49789.4867115539. The cubic root of 2478992987 is about 1353.3966569427.

The spelling of 2478992987 in words is "two billion, four hundred seventy-eight million, nine hundred ninety-two thousand, nine hundred eighty-seven".