2478493687 has 2 divisors, whose sum is σ = 2478493688. Its totient is φ = 2478493686.

The previous prime is 2478493637. The next prime is 2478493711. The reversal of 2478493687 is 7863948742.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2478493687 is a prime.

It is a super-2 number, since 2×2478493687² = 12285861912997707938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2478493637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239246843 + 1239246844.

It is an arithmetic number, because the mean of its divisors is an integer number (1239246844).

Almost surely, 2^2478493687 is an apocalyptic number.

2478493687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478493687 is an equidigital number, since it uses as much as digits as its factorization.

2478493687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 58.

The square root of 2478493687 is about 49784.4723483136. The cubic root of 2478493687 is about 1353.3057872055.

The spelling of 2478493687 in words is "two billion, four hundred seventy-eight million, four hundred ninety-three thousand, six hundred eighty-seven".