2489975787 has 16 divisors (see below), whose sum is σ = 3593509920. Its totient is φ = 1524509952.

The previous prime is 2489975777. The next prime is 2489975809. The reversal of 2489975787 is 7875799842.

It is not a de Polignac number, because 2489975787 - 2⁶ = 2489975723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2489975767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154362 + ... + 169727.

It is an arithmetic number, because the mean of its divisors is an integer number (224594370).

Almost surely, 2^2489975787 is an apocalyptic number.

2489975787 is a deficient number, since it is larger than the sum of its proper divisors (1103534133).

2489975787 is a wasteful number, since it uses less digits than its factorization.

2489975787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324302.

The product of its digits is 71124480, while the sum is 66.

The square root of 2489975787 is about 49899.6571831911. The cubic root of 2489975787 is about 1355.3923850107.

The spelling of 2489975787 in words is "two billion, four hundred eighty-nine million, nine hundred seventy-five thousand, seven hundred eighty-seven".