2488391687 has 4 divisors (see below), whose sum is σ = 2491136136. Its totient is φ = 2485647240.

The previous prime is 2488391663. The next prime is 2488391693. The reversal of 2488391687 is 7861938842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7861938842 = 2 ⋅3930969421.

It is a cyclic number.

It is not a de Polignac number, because 2488391687 - 2¹⁶ = 2488326151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2488391387) 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 in 3 ways as a sum of consecutive naturals, for example, 1370864 + ... + 1372677.

It is an arithmetic number, because the mean of its divisors is an integer number (622784034).

Almost surely, 2^2488391687 is an apocalyptic number.

2488391687 is a deficient number, since it is larger than the sum of its proper divisors (2744449).

2488391687 is an equidigital number, since it uses as much as digits as its factorization.

2488391687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744448.

The product of its digits is 4644864, while the sum is 56.

The square root of 2488391687 is about 49883.7818033076. The cubic root of 2488391687 is about 1355.1048945906.

The spelling of 2488391687 in words is "two billion, four hundred eighty-eight million, three hundred ninety-one thousand, six hundred eighty-seven".